The married father-of-three said that he was happy to reach the milestone because he has everything that he wants.
He told Empire magazine, ‘It’s a good birthday – because a lot of the bigger questions are answered.
‘I’m married with kids, all the things I was worried about at 30 I don’t worry about any more.’
The actor shot to fame alongside best friend Ben Affleck after they co-wrote Good Will Hunting in 1997, and he said he hopes to be able to team up with his buddy again sometime in the future.
‘You don’t always get to work with the people that you want to. I mean, I haven’t worked with Ben in years, and he’s my best friend,’ he added.