George Clooney has offered to adopt some of Brad Pitt's kids.

The 'Fantastic Mr. Fox' actor - who has no children - claims he owes his 'Ocean's 11' co-star a favour and is willing help out with his six children.

He joked to BANG Showbiz: "I am planning to adopt. I am going to adopt some of Brad Pitt's kids. I owe him."

George previously revealed he has no plans to become a father, but spends time with Brad, his partner Angelina Jolie and their large brood whenever he feels lonely.

He said: "Even one kid running around my villa makes me nervous, so I'm definitely not a candidate for father of the year. If I need to surround myself with children and feel like I have this big extended family, I can always call Brad and Angelina and ask them to stay with me, just to remind myself why I'm so happy."

George has also revealed he formed such a close bond with his 'Fantastic Mr. Fox' co-star Jason Schwartzman he feels like a parent to him.

When asked if voicing the animated family movie had made him broody, George said: "Broody? That's a word that Americans don't understand. Just having Jason here next me was like having a son. And he just got married by the way, so it will soon be like being a grandfather!"

The 48-year-old actor is currently dating Italian TV presenter Elisabetta Canalis.