Kaley Cuoco had a special role to play in her little sister’s big day!

The Big Bang Theory star, 39, officiated the wedding between sister Briana Cuoco, 36, and Brian Logan Dales, 35, which took place on Tuesday, December 31 at the Cathedral of St. Vibiana in Los Angeles.

Briana told Entertainment Tonight on Thursday, January 2 that Kaley officiating was “so special to me.”⁠

While mom Kaley was busy with her officiating duties, her 22-month-old daughter Matilda, whom the actress shares with Tom Pelphrey, acted as flower girl for her aunt’s big day.

Happy family! Kaley Cuoco and boyfriend Tom Pelphrey are over the moon after welcoming daughter Matilda on Thursday, March 30. “Kaley and Tom are on cloud nine! They’re so in love with Matilda and call her ‘Tilly’ for short,” a source exclusively reveals in the new issue of Us Weekly. “Matilda is the spitting image […]

Taking to social media, Kaley shared snaps from the special occasion via her Instagram on Thursday, January 2 and raved about her involvement.

“⭐️ The best NYE to date 💫” she captioned the 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!”

Kaley also shared several posts via her Instagram Story, including adorable clips of herself and Pelphrey walking Matilda down the aisle in her flower girl attire.

Per ET,  the cathedral that Briana and Dales tied the knot in was decorated with a “French museum” theme. Red lighting, 1,200 candles and Renaissance paintings projected onto the ceiling created the “dark and moody” vibe they were looking for.

There was a nod to New Year’s Eve during the wedding, with fireworks projected on to the ceiling as the clock changed to midnight.

Briana wore a Kim Kassas Couture corset-style strapless dress for the couple’s ceremony and changed into a Selkie mini-dress for her reception attire. Groom Dales, who is The Summer Set’s lead vocalist, wore a black double-breasted tuxedo for the big day.

Following the ceremony and reception, guests were treated to late-night dining from Taco Bell.

Kaley Cuoco moved on with Tom Pelphrey less than one year after she filed for divorce from equestrian Karl Cook. “Life lately,” the actress captioned an Instagram gallery in May 2022, sharing multiple selfies with Pelphrey. “The sun breaks through the clouds, rays of gold slipping into my eyes and heart, rays of yellow to […]

Kaley previously shared her joy about her sister’s relationship, announcing via her Instagram in September 2023 that her sibling was engaged.

“Engagement of the year!! 🩷🩷🩷 we love you @bricuoco @brianlogandales !! Fam for life! 💫 congratulations!!!!!!!” Kaley wrote.

Over on her own Instagram account at the time, Briana shared photos of the proposal and captioned the post, “9.12.23 💍.”

Briana previously spoke about the close bond she shares with her sister and the rest of her family.

“My sister and my parents, we all have just forever and ever wanted to be rocks and supports for each other,” she told E! News in 2013. “Kaley is that for me and I am that for her, and it was incredible having her there at truly one of the best moments of my life. My parents are just the best people on the planet and they’re so happy for me.”