The protective Ted star is still coming to terms over his 13-year-old daughter's dating life.
Daddy's Home stars Mark Wahlberg and Will Ferrell's kids are pre-dating online.
Wahlberg's teenage daughter Ella is smitten with Will's 13-year-old son Magnus, and protective dad Mark admits he approves of the relationship.
Appearing with his co-star in a taped chat for Tuesday's (05Sep17) season 15 premiere of The Ellen DeGeneres Show in America, Mark jokes, "I thought he (Magnus) was a lovely lad until I found out that he has formed some sort of communication with my oldest child."
"They're following each other on Instagram," Ferrell adds.
Wahlberg admits he has come to accept the fact that his daughter, also 13, has discovered boys.
"In actuality, as I've thought about it, I've come to understand that it is inevitable that she'll be with somebody," he admits. "So, if it could be with someone like Will, I would be happy."
"She's in good hands," Ferrell adds, joking that his son is "a good boy", who "buys knives on the Internet".
Will explained young Magnus thought they were pocket knives but they turned out to be professional hunters' blades: "He just ordered them on Amazon."
"So, keep your cutlery locked up if he comes over to hang out," the funnyman tells his castmate. "Other than that, he's very sweet."
Wahlberg recently told news show Entertainment Tonight that as far as he is concerned no one is good enough for his daughter: "Nobody is a good type or sort," he said. "She's a sweetheart, she's growing up too fast. It's just the fatherly thing in me, you know? I just don't want her being anything other than sheltered and protected."
He and Will have reteamed for the sequel to Daddy's Home, which will also feature Mel Gibson and John Lithgow.