Kaley Cuoco Officiates Sister Briana Cuoco’s New Year’s Eve Wedding

Kaley Cuoco helped her sister kickstart the new year with a big bang.

The Big Bang Theory star served as the officiant at the wedding of her younger sister Briana Cuoco, who married during a sweet New Year’s Eve ceremony.

In a post shared by Kaley, 39, the actress poses with her fiancé Tom Pelphrey while donning a long red dress inside of the Cathedral of St. Vibiana in Los Angeles. Kaley’s post also included pictures of her and Tom sharing a kiss to ring in the new year, pics with the bride and groom and sweet images of their 22-month-old daughter Matilda—who served as a flower girl—posing in her tulle dress and holding her basket.

“The best NYE to date,” the Flight Attendant star wrote on the Jan. 2 Instagram post. “I got to marry my sis and her love , blend two amazing families together surrounded by our friends , a gorgeous environment , a kiss at midnight with the love of my life , and a perfect flower girl what a night to remember!”

Briana, 36, and Brian, 35, also shared pictures from their ceremony on their respective Instagram accounts. According to Entertainment Tonight, the Dead Boy Detectives actress and the “Chelsea” singer opted for a “French Museum” vibe for their ceremony.

As for the stunning details, Briana wore a gown by Kim Kassas Couture and changed into a sleek mini dress by Selkie for the reception. For his part, Brian wore a classic double-breasted tuxedo.

As the clock struck midnight, fireworks projected on the ceiling on the cathedral so guests could ring in the new year. And after a night filled with dancing, Briana and Brian treated the attendees to late night bites provided by Taco Bell, according to ET. 

Briana, and Brian—who is the lead singer of The Summer Set—began their relationship in 2021, getting engaged two years later. Kaley shared the news of her sister’s engagement, which was attended by their family and friends.

Keep reading to see more stars celebrated the new year… 

Kourtney Kardashian & Travis Barker

The couple appeared to get the party going at Disneyland before sharing a sweet kiss as the clock struck midnight.

Scott Disick & Reign Disick

Meanwhile, Kourtney’s ex counted down with their 10-year-old son Reign.

Hailey Bieber

The Rhode Beauty CEO closed out the new year in the best way: with In-N-Out and a dirty martini. 

Rihanna

The Fenty Beauty founder kept it casual by counting down the seconds ’til 2025 from home.

Ariana Madix

The Vanderpump Rules star and her boyfriend Daniel Wai shared a smooch at midnight. 

Lucy Hale

The Pretty Little Liars alum got cheeky on a boat this New Year’s Eve.

Alix Earle

Alix got a head start on her resolutions as she worked up a sweat during the last few moments of 2024. 

Scheana Shay 

The Vanderpump Rules alum stood alongside friends Lance Bass and Cortney Erin during this year’s celebrations.

Jordyn Woods and Karl Anthony Towns 

The model and NBA player soaked up some vitamins right before 2025 officially arrived.  

Cardi B

The “Money” singer appeared to show off her moves at a club on NYE.

Simone Biles

The Olympic gymnast received her flowers one last time in 2024 from her hubby Jonathan Owens. But there’s no doubt that there’s much more where that came from in the New Year. 

Victoria Justice 

The Nickelodeon alum had a low-key celebration at home to welcome the new year.

Kyle Cooke

The Summer House star had one last gym sesh before the end of 2024, and even gave fans a sneak peek into his 2025 goals. 

Emmy Rossum 

It was a family affair for this Shameless alum as she rang in 2025 with her parents. 

Lindsay Lohan 

The Our Little Secret actress—who lives in Dubai—had quite the view during the turn of the year. 

Lily Collins and Charlie McDowell

The couple welcomed 2025 by dancing the night away in London.

Kelsea Ballerini and Chase Stokes

The “Cowboys Cry Too” singer was all smiles with boyfriend Chase Stokes in a snap that looked straight off the shores of the Outer Banks.

Katy Perry and Orlando Bloom

The couple had a very zen end to 2024 as they rang in the new year from Tokyo. 

Anya Taylor-Joy

The Queen’s Gambit actress proved she had a night to remeber with a snap of her friend circle’s muddied shoes. 

Sofia Vergara

The Modern Family actress posted a cheeky snap before ringing in 2025. 

Alexandra Daddario

Looking forward to what’s ahead, the Baywatch actress enjoyed a scenic New Year’s Eve abroad.

Dua Lipa

Cheers! The “Houdini” singer looked absolutely magical as she clutched a drink ahead of the new year.