Kaley Cuoco officiates sister Briana's wedding, with 1-year-old daughter as flower girl

Kaley Cuoco's 2025 started with a big bang!

The "Big Bang Theory" alum posted a carousel of photos at a romantic New Year's Eve wedding ceremony that she officiated for her younger sister Briana "Bri" Cuoco and new brother-in-law, The Summer Set lead vocalist Brian Logan Dales.

"The best NYE to date 💫 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," she captioned the post, which featured photos alongside her soon-to-be-husband Tom Pelphrey.

The sweet snaps featured the couple's 1-year-old daughter Matilda, who was the flower girl. According to exclusive photos from Entertainment Tonight, the "Voice" singer and bride stunned in Kim Kassas Couture and a mini-dress for the reception by Selkie.

In a September 2023 post on Instagram, Cuoco announced her sister’s engagement to Dales.

"Engagement of the year!! we love you @bricuoco @brianlogandales !!" Fam for life! 💫 congratulations!!!!!!!

In August, Cuoco made a big bang on the internet with a buzzy announcement of her own: her engagement to fiancé Tom Pelphrey.

Kaley Cuoco and Tom Pelphrey announce engagement with new photos

Cuoco shared a photo of the couple, dated Aug. 10, in which they can be seen sweetly nuzzling their faces. Cuoco proudly held up her hand to show off the square-cut engagement ring. "Amazing weekend," she wrote.

"What a wild, beautiful journey life can be," Cuoco added alongside a video close-up of the ring. "Grateful for every road that led me straight to you (Tom Pelphrey)."

The "Flight Attendant" star and Karl Cook broke up after three years of marriage in 2021. Cuoco and her equestrian ex-husband shared the news in the joint statement at the time, writing that "despite a deep love and respect for one another, we have realized that our current paths have taken us in opposite directions."

Kaley Cuoco opened up about parenting to USA TODAY's The Essentials

Cuoco previously opened up to USA TODAY's The Essentials previously about parenting advice, but said she doesn't have a lot to offer on the subject.

"My advice is don't take any advice because every kid is different," she said. "What my kid needs is not what your kid needs, and our household is different than yours, and it's survival. You do what you can do.

"If she's going crazy, and I plop her on the couch to watch a Disney movie, like thank you, you get 10 minutes. That's great. To me, that's wonderful," she added.

"There's maybe the next mom who doesn't want them to watch TV, and that's fine too. But that definitely works for us."

Contributing: Amy Haneline, Erin Jensen, Edward Segarra

This article originally appeared on USA TODAY: Kaley Cuoco shares moments from sister Briana's 'gorgeous' wedding