Looking younger than your years certainly has its perks in Hollywood, but for actor Ryan Phillippe it also comes with an unexpected downside.

The Secrets and Lies star, 42, admitted to The Late Late Show host James Corden that he and his teenager daughter Ava are sometimes mistaken for brother and sister.

The host teased the Cruel Intentions actor about his youthful appearance when Phillippe stopped by the show on Nov. 9. “How would you even be remotely old enough to have a 17-year-old child?” he joked, adding that the actor “looks like he was born yesterday.”

But not everyone admires the actor’s fresh-faced glow. Phillippe revealed his 17-year-old daughter, whom he shares with ex-wife Reese Witherspoon, finds it cringeworthy when people think they're siblings.

“One thing that I know my daughter gets embarrassed sometimes by is the fact that I do look so young and I get mistaken for her brother at times, which repulses her,” he said. “It absolutely repulses her that anyone could mistake me for being her brother.”

Phillippe became a father at the young age of 25, and he told Corden that because his mother ran a daycare center out of their home, he was “ready to be a young father because I grew up raising kids."

"I grew up working in the daycare, I would teach the kids to swim, I would do magic shows for them,” he said.

As Us Weekly reported on November 3, the Shooter actor and his fiancée, Paulina Slagter, have parted ways, closing the door on a five-year relationship and ending their 10-month engagement. However, Phillippe remains cordial with his exes, and told Larry King last year that he and ex-wife Reese “very much” remain friends. 

“I think more of the problem was age. When we got together we were so young,” he said. “I think it can create issues with two people in this industry because there’s so much noise that goes along with it.” 

Phillippe and Witherspoon, who were married for eight years before they split in 2007, also share son Deacon, 13. Phillippe, who has also dated actress Abbie Cornish, has a 5-year-old daughter Kai, with his ex-girlfriend Alexis Knapp.

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!