Meanwhile, Pratt - who has Jack, 10, 2-year-old Lyla and 12-month-old Eloise with Katherine - recently said it has been “surreal” to have the Terminator actor as part of his family.
He has loved getting to know the “regular” guy behind the Hollywood action star and revealed that he has “never” been able to beat his father-in-law at a game of chess.
Speaking on Late Night with Seth Meyers, he said: “It is pretty surreal! I’ve gotten to obviously know the regular guy and all of that, he’s a great dad, a great grandad, and a good father-in-law and he’s got a wealth of experience.
“It’s been very nice, he’s a great dude. We play chess a lot. I’ve never beaten him, he’s very, very good. "