"Happy Mother’s Day to all the mums out there who’s alarm clocks are drop kicks to the face," she began a snap alongside her daughter in bed.
"I wouldn’t trade that wake up call for anything in the entire world, becoming a mother has been the greatest gift and now I know the actual meaning of true love," she continued.
"Celebrating all moms today in every form. And the biggest thanks to my mom who has the biggest warmest heart, you have taught me so well. you’re my best friend and I love you ♥️#thanksmom♥️#thanksmysweetbriar♥️♥️♥️."
Bilson shares three-year-old daughter with former partner Hayden Christensen.
As previously reported by WHO, the married couple separated in September 2017 after being legally wed for 10 years.