Rachel Bilson talks about finding the "advantages" of 5am diaper changes for daughter Briar Rose. Credit: Taylor Hill/FilmMagic

Rachel Bilson is loving motherhood — however sleep-deprived she may be — and has vowed to see the silver linings in all of her daughter's milestones. Welcoming daughter Briar Rose with fiance Hayden Christensen in November 2014, The O.C. alum says it's the early mornings with her little girl that mean the most.

"What I woke up to this morning: the advantages of having a baby poop herself awake at 5 am," Bilson, 33, captioned a Sunday, June 28, Instagram photo of the stunning Los Angeles sunrise out her daughter's window.

What I woke up to this morning, the advantages of having a baby poop herself awake at 5 am

A photo posted by @rachelbilson on Jun 28, 2015 at 12:03pm PDT

Keeping mostly mum on her new family with longtime love Christensen, 34, Bilson has used Instagram in the past to allude to life as a mom. Joining the social media photo sharing site in June, the Hart of Dixie actress shared a photo of Star Wars-themed Darth Vader Vans sneakers sized for both Christensen and his daughter, 9 months. The kicks are a nod, or course, to Christensen's Star Wars character, Anakin Skywalker.

Parenthood is clearly Bilson's calling. "She's incredible," her Hart of Dixie costar Mircea Monroe told Us earlier this month. "She's a great mom."

Can't get enough of Us? Sign up now for the Us Weekly newsletter packed with the latest celeb news, hot pics, and more!