Stars Tell Us: When I Knew I Was Becoming My Mom

 Mike Coppola/Getty; D Dipasupil/FilmMagic; Jamie McCarthy/WireImage

Happy Mother's Day!

While celeb moms relax and recharge on their special day, Us Weekly asked stars like Kelly Osbourne, Hayden Panettiere and Olivia Wilde to tell Us: When did you know you were turning into your mom?

Read on for stars' touching — and often humorous! — responses in honor of Sunday's holiday.

Kelly Osbourne: "I had that harsh reality where I woke up one day and realized 'I am my mother!' But, if I could be anyone, I'd be her!"

Hayden Panettiere: "You get to an age and you hear things come out of your mouth, or certain mannerisms and you're like "'Oh my gosh! I am so my mother's daughter!'"

Olivia Wilde: "I could learn a lot from my mom. She's really good at what she does and I really respect her work, it's something I'm in awe of."

Rose Byrne: "I'm really good at planning and I can be quite stern at times, just like her. [I] just hear [myself] sometimes and think 'I sound just like my mother!' It's crazy, but a good thing in my case. She's wonderful."

Star Jones: "I am 100% my mother. So much so that right after I had open heart surgery, I came home to my house and started bossing people around. My brother, father and sister turned around to me and said" 'You're turning into Mommy.' My own mother even said it!"

Will Ferrell: "When I started wearing bras."

Kristen Bell: "I'm still in a place of denial [about turning into her], so I don't know if I can pinpoint the ways that we're similar. Although she did teach me to stand up for what I believe in, so I guess I do have some good qualities of hers."

Edie Falco: "There are certain vocal patterns [of mine] that sound sort of familiar and I'll think, 'that's where I've heard that.' The sound of my voice or my laugh."

Elizabeth Berkley: "Whenever I say [I'm turning into her], I love it! I say, 'that's my mom. I love it.' My mom's amazing. She's a powerhouse. Usually when I take an action where I'm a little more fearless [is when I recognize her]. She embodies that and it's beautiful."

Tell Us: When did you know you were turning into your mother?

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