The Untold Truth Of Kaley Cuoco's Sister

Kaley Cuoco has certainly made a name for herself in Hollywood. She starred in ABC's sitcom 8 Simple Rules, where she played the late John Ritter's daughter, and won two People's Choice Awards for Best Comedic TV Actress for her work on the CBS hit sitcom The Big Bang Theory. In 2018, she was Forbes' second highest-paid female actor on television. And, of course, she has an endearing bond with her younger sister, Briana Cuoco. And if you follow either on Instagram, you've definitely witnessed some of their charming sibling moments.

Briana is a day shy of being exactly three years younger than Kaley; thanks to a leap year in Bri's birth year, 1988, the two seemingly just missed sharing a birthday. Nonetheless, Kaley calls them "November birthday twins." Before branching out on her own, Briana worked as her sibling's assistant, telling The Voice host Carson Daly (via Entertainment Weekly), "My sister understands that I have aspirations, that I have things that I wanna do."

Even with Kaley becoming a big Hollywood star she admitted in an Instagram post she's, at times, envious of her little sister, writing, "You are so special to so many and I'm constantly in awe (and slightly jealous) of how cool you are ! love you so much are on the brink of greatness!" Read on to discover the untold truth of Briana Cuoco.

Briana Cuoco has her own streetwear line

In July 2020, Kaley Cuoco's Instagram followers saw The Wedding Ringer starlet and her little sister, Briana Cuoco, rocking matching leggings. Oh, but they weren't just any ol' leggings. Rather, they were leggings from CULT, the Los Angeles-based clothing company that was founded by Briana. "Most streetwear brands are made by men, for men," Briana said in a video promoting the line. "I wanted to start a brand that was made by women."

Before the brand was launched in late 2019, Briana told VoyageLA that it was a challenge starting the company from scratch, saying, "I had literally zero idea what the hell I was doing." She further told the outlet she was motivated to start this venture because "the entertainment business is unpredictable and you have little to no control throughout most of it." After attending business seminars and other mediums, it took less than two years for her company to launch. She noted that it takes "a team of people that have your back emotionally and that you really trust to do their jobs" to make a clothing line happen. "I'm also really proud of the fact that we're a company completely built and run by amazing women," she said. 

Briana created a job for herself while fulfilling a passion of hers, telling Jen Biddle, Sharing a Smile, "I am really into boys clothes and making it look sexy for a woman."

Music has been a part of Briana Cuoco's life for a long time

Just like sister Kaley Cuoco, Briana Cuoco started performing at a young age. On a 2020 episode of Jen Biddle, Sharing a Smile, Briana said her parents realized early on that she could carry a tune. "So, they put me in singing lessons and then musical theater happened," she said. Briana added that her family was not in the music business, but her parents' love of music shaped her in a big way.

In 2019, Cuoco told VoyageLA that as a youngster she also did both print and commercial work and progressed as she got older. By the time Cuoco was in middle school she solely locked in on dancing and continued that through graduating high school up until she began booking professional dancing gigs. "I worked briefly as a dancer on shows like Glee and America's Got Talent but I quickly realized being a dancer wasn't what I was meant to do, my heart was with singing and acting," she told the magazine. Clearly, this career change has worked out for the triple threat. 

Two shows brought Briana Cuoco on as a choreographer

In 2012, The Big Bang Theory cast and crew performed their first infamous flash mob during a live taping of season six episode "The 43 Peculiarity." At PaleyFest in 2013, Kaley Cuoco shared the story about how her sister, Briana Cuoco, had a hand in creating "the best moment of [her] whole life."

Kaley told the cast about her idea of the flash mob, but there was one problem. "I didn't know how we were going to pull this off," she recalled. But thanks to her sister, who "happens to be an incredible dancer and choreographer," Kaley was able to make her flash mob dream come true. Thirty minutes after Kaley reached out, Briana had "the whole thing" mapped out. From there, the rest was history.

The Big Bang Theory creator and executive producer, Chuck Lorre, called up Briana to choreograph a sequence in Two and a Half Men's musical episode, "Grab a Feather and Get in Line." Lorre complemented Briana at PaleyFest saying "she killed it" when she organized a group of 50-some odd dancers on Two And A Half Men's set. Lorre added, she's an "amazingly talented woman." It's no wonder The Big Bang Theory had Briana choreograph their final flash mob ahead of the series finale.

Kaley Cuoco's sister was a theater star

Chatting with Jen Biddle, Sharing a Smile in 2020, Briana Cuoco shared that her childhood dream was to be in Annie on Broadway. Kaley Cuoco's sibling may not have accomplished that feat, but nonetheless, she has been a star on stage.

Briana performed on stage assuming various roles in theater productions during the mid 2010s. Leading up to playing Heather in Los Angeles' first production of American Idiot in 2015, Briana wrote for Broadway World, "I love being in rehearsals for hours, I love figuring out the arc of the show as a whole and how your own personal story contributes." In 2016, Briana played a character based on real life axe-murderer Lizzie Borden in LIZZIE: The Musical in Los Angeles. She had a ball performing in the production, telling ET that year, "It's rock, like heavy rock music, which I love singing, personally." Talking about the character, Briana said, "She's so fascinating, I mean, she obviously has a little bit of screws loose up in there, which is so fun to play." According to her website, Briana also played lead roles in several The UMPO Series productions, including stage parodies of motion pictures such as Clueless, Mean Girls and 10 Things I Hate About You.

Bri's work in theater has impressed her sister, Kaley, who, in 2016, posted a photo on Instagram that she took backstage at a Las Vegas stage production of BAZ with Briana and her castmates, writing, "Amazing show and [Briana] is beyond words! Go see it!!" 

Light up the Bat-Signal for Briana Cuoco

Briana Cuoco has forever secured her legacy in the DC Universe. On the second season of animated series Harley Quinn, Briana joined the cast's roster when she was brought on to provide the voice for Batgirl. 

In a 2020 Cup of Cuoco video, Briana credited her sister, Kaley Cuoco, for giving her the part of Barbra "Batgirl" Gordon. Kaley is not only the voice actor for the title character on Harley Quinn, but serves as the program's executive producer. However, Kaley denied the notion that she handed Briana the role of Batgirl, saying, "She auditioned for it. You guys, I can't help that she's good." Briana can be heard in four episodes portraying the character and may return for more, as HBO Max announced in the fall of 2020 that the series was picked up for a third season. In addition to Batgirl, Briana also voiced minor characters. The Voice alum called her role as Batgirl the "best job of all time" on Jen Biddle, Sharing a Smile.

On top of that, it has earned positive reviews: Entertainment Weekly gave the show an "A-" and wrote, "Harley Quinn needs so many more seasons." It's a good gig, a well-regarded series, and a chance for the sisters to work together. What more could you ask for? 

Christina Aguilera was wowed by Briana Cuoco's voice

The Voice fans may remember Briana Cuoco from Season 5 of the hit singing competition show. Following her debut on the series, Briana told Extra it was her sister Kaley Cuoco who encouraged her to audition. And Kaley's The Big Bang Theory co-stars were rooting for Briana, too. As Jim Parsons told Access, "We give Kaley a lot of hell, like, 'Oh, so finally the world is going to see the really talented Cuoco!'" (Obviously, this comment was all in good fun.) 

Briana's talent impressed five-time Grammy Award-winner Christina Aguilera, who spun her chair during Briana's blind audition to the tune of Lady Gaga's "Yoü and I." Country music icon Blake Shelton eventually stole Briana before she was bounced out amidst the opening knockout rounds. According to her website, she ended up in the top 32 of 50,000-plus auditionees. "I am so sad to be leaving The Voice, but it's been a really great opportunity," she said (via TODAY).

In 2016, Briana told Craftversations! she was getting booked for musical theater gigs, so her music career took "a little bit of a backseat" at the time. "I am, you know, doing videos for YouTube and trying to stay ... a little relevant," she added. Briana hasn't posted much on her YouTube channel since her 2017 cover of Demi Lovato's "Smoke and Mirrors," but she occasionally shares videos on Instagram where she's singing at events with a band or solo.

The Cuoco sisters reunited on The Flight Attendant

In 2013, Briana Cuoco had a cameo in The Big Bang Theory on Season 6 episode "The Tangible Affection Proof." Ever since, she has been no stranger to acting on television. As her website notes, she's appeared on shows like The Mentalist, NCIS and Criminal Minds. In 2020, Briana reunited with her sister in live-action form on HBO Max series The Flight Attendant, which Kaley Cuoco stars as the lead character and is an executive producer.

In 2020, Kaley told Extra she didn't even know her sibling was auditioning. "I was actually watching casting videos and I saw her on there and I was, like, couldn't believe it," and added, "People think that I can just grant wishes and be like, 'You want to be in it? Sure.' Not how it works." The Big Bang Theory star explained that hers is one of "like 20 opinions," but ultimately, her little sister won 'em over. "Everyone loved what Bri did and she actually plays a very pivotal role so I was, I am thrilled for her," Kaley continued. "And we're living together in Brooklyn, like roommates. [We] had a blast."

Kaley said she personally called Briana to inform her she won the role, and then they broke the news to their parents via FaceTime. Oh, to be a fly on the wall of that certainly delightful FaceTime call!

Like a true superfan, Briana Cuoco has Bachelor leggings

Kaley Cuoco made headlines in 2016 when she shared on Instagram that she called into The Bachelor. Briana Cuoco posted that same video on her Instagram, writing, "Those d*mn twins took our spot." That same year, Briana revealed to ET that she, Kaley and their dogs watch The Bachelor together. The former People's Choice Awards choreographer admitted that even though she is a fan, "[she] would never want to be a contestant" on the long-running reality series, but she wouldn't totally rule out every show in the franchise.

"I think I just would want to be The Bachelorette but I think that's harder ... being the one person ... oh, God. I think it would make me sad," Briana said. "Yeah, I think it's really difficult to do that." She did shoot her shot with The Bachelor's Ben Higgins, saying, "Ben, if you didn't find someone this season..." And then, she gave the phone call hand gesture and mouthed, "You got my number." When the finale rolled around, the sisters sported custom leggings in an Instagram post with the faces of the top two contestants on each leg: One pair read #TeamJoJo for JoJo Fletcher and the other #TeamLauren for Lauren Bushnell, the latter being the eventual winner of Season 20.

In 2020, Briana revealed watching The Bachelor and The Bachelorette is her top guilty pleasure, telling Jen Biddle, Sharing a Smile, "It's the only, really, reality show I watch ... It is some fantastic TV."

Briana Cuoco is not afraid to break out the 'sister fangs'

Much like her sister Kaley Cuoco, who, as BuzzFeed noted, clapped back at trolls who took issue with her Instagram post about working out with a mask on, Briana Cuoco isn't afraid to slam internet critics.

According to The Blast, the Mean Gurlz stage thespian went in on someone who supposedly slid in her DMs and said, "Stop covering up in bulk, you are beautiful and confident woman." The outlet reported that Briana fired back at the keyboard warrior—without identifying the user or pointing out their grammatical flaws—in an Instagram Story, writing, "Those of us that identify as female don't need to dress in tight clothes to feel beautiful, confident or sexy!! Personally, sometimes I feel my sexiest & most confident in clothes that are stereotypically made for identifying males and that's literally no one else's concern or decision but my own!!" In 2016, The Voice singer admitted that she backed up her sister when The Big Bang Theory actor was under attack on social media, telling ET, "I shut them down. My sister fangs come out, seriously. ... I'm thinking of two specific times and she actually text me, she's like, 'Sis, thanks for having my back.' I was like, 'Of course.'"

Trolls better be prepared to take the wrath of the Cuocos when @-ing either sister on social media; Briana and Kaley are not afraid to put people in their place.

The Cuoco sisters are very close

Briana Cuoco has tagged along with Kaley Cuoco at numerous events, award shows and red carpet appearances. Beyond supporting each other's performance arts careers the sisters spend a lot of time together — especially during the global pandemic. In August 2020, the two shared in a Cup of Cuoco video that they quarantined together in upstate New York before they could get back to filming The Flight Attendant. And they sure kept busy over the summer: A month prior, Kaley posted photos from a session with a trainer and called Briana her "workout buddy."

Their connection is a strong one, to say the least. Back in 2016, Briana told ET that Kaley often gives her advice about the industry, relaying Kaley's message, "Keep your feet on the ground ... don't take yourself too seriously, don't be a jerk, just be a good human and work hard and things will happen."

The relationship between these two talented sisters prove the adage "blood is thicker than water" is true. With these two working together on HBO Max's The Flight Attendant and Harley Quinn, they are doing their father proud. As Kaley told Extra, seeing his two daughters work together was his "biggest dream as a dad." Aww.