Kaley Cuoco & Sister Bri Stun In Windswept Backyard Birthday Snap

BrianaCuoco/Instagram

Kaley Cuoco doesn't make it all about herself. The "Big Bang Theory" alum might be in full promo mode for newly-released "The Flight Attendant" series, but she'll take the time for a family birthday shout-out. Early on Sunday morning, Kaley updated her Instagram to celebrate sister Briana turning 32, with the 34-year-old sitcom star posting a stunning, windswept, and backyard snap of herself and little sis Bri. The two, who jointly star on "The Flight Attendant," couldn't have looked cuter. Check it out below.

KaleyCuoco/Instagram

Scroll for the latest photo. The above one, seeing Bri and Kaley working out in L.A. this summer, reminded Kaley's 6.2 million Instagram followers that there's more than one Cuoco. Bri, who runs her Cult LA athleisurewear line and featured in a 2013 episode of "Big Bang" is set to become a way bigger deal thanks to just-dropped HBO Max series "The Flight Attendant."

The selfie, a black-and-white one, showed the siblings smiing and outdoors. Kaley, wearing a fuzzy gray-marl sweater, threw out her biggest grin, with Bri likewise smiling and in a denim jacket.

KaleyCuoco/Instagram

Kaley took to her caption for a big shout-out, writing:

"HAPPY HAPPY BIRTHDAY TO MY FAVORITE SIDDER ON PLANET EARTH!!! 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 ..you are on the brink of greatness! @bricuoco."

The post wasn't even ten minutes old before Bri swooped into the comments section. Thanking her superstar sister, Bri wrote: "Love you love you sister!!"

Keep scrolling for more photos.

KaleyCuoco/Instagram

It's been a long time coming. After three years in the making and a giant pandemic pause, "The Flight Attendant" finally aired on November 26. The thriller sees Kaley playing Cassandra Bowden, a woman who wakes up hungover in a Dubai hotel room, but with a dead body next to her.

Sonoya Mizuno, Michiel Huisman, Colin Woodell, Zosia Mamet, Merle Dandridge and Griffin Matthews also star, alongside "Dr. Who" face Michelle Gomez. Kaley had no words for the crew's efforts in her latest "A Cup of Cuoco" episode. Scroll for Bri's killer workout body.

BrianaCuoco/Instagram

Bri, this year in the news for her workout snap with Kaley turning into a storm as fans slammed her clothing brand's high prices, is set to become a way more prominent Hollywood face. "The Voice" alum is already racking up the Instagram followers, and she's also appeared on Kaley's impromptu "A Cup of Cuoco" series. The two delivered a memorable episode this summer while undergoing a mandatory, 14-day quarantine in upstate NY prior to wrapping up shooting in NYC.