The Australian hunk hosted the Academy Awards in 2009 and said the two stars must remember to eat something before the start of the show.
He told E! Online: 'It's a long show. I actually took out cookies during one of the commercial breaks because I had a note from my wife saying, 'You're doing a great job'. And I was really hungry.
'So we had some cookies and I got mobbed! You've never seen anything like it. All these A-list actors just mobbing me for chocolate chip cookies.'
Asked if they should have a couple of drinks to steady their nerves, he said: 'Maybe near the end, but it's too long. I wouldn't know how to negotiate that!'