The 61-year-old actor joins the second installment of the hit comedy starring Mark Wahlberg and Will Ferrell, and ET's Kevin Frazier got a first look at Gibson in action during a visit to the Boston set last
"It's pretty dang cool," Wahlberg gushed of having Gibson play his dad -- despite the only 16 year age difference between them.
"It was difficult getting him to play my dad, because he's actually two years younger than me," he joked.
"Tell him you've been astounded," Gibson pleaded.
Wahlberg and Ferrell reprise their roles as father and stepfather in Daddy's Home 2, though this time around, they've joined forces to give their kids the perfect Christmas. The pair's partnership, however, is put to the test when their own fathers arrive just in time for the holiday.
John Lithgow joins the film as Ferrell's ultra-affectionate and emotional father, and while he jokingly called Gibson -- who plays Wahlberg's macho dad by contrast -- an "insufferable diva," it seems he's quite strict himself.
"It's fantastic. It's always such a joy the little ones, you know? It's like being young again, seeing everything through their eyes," Gibson gushed.
"It's great because the first conversation that we had, we started talking about what I was going through with my 13-year-old daughter," Wahlberg added. "He was very helpful of giving me advice on how to deal with a teenager."
"Yeah, right! I've had a bunch of them," Gibson said.