Matt Damon is more content with life now than he was 10 years ago.

The 40-year-old actor -- who has four-year-old Isabella, two-year-old Gia and three-month old Stella with wife Luciana, and is stepfather to her 11-year-old daughter Alexia from a previous marriage -- didn't mind reaching the milestone age recently because he has fulfilled his personal goals.

He said: "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."

Though Matt is content with his personal life, he still has professional ambitions he wants to achieve - including working with his friend Ben Affleck again.

He told Empire magazine: "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."

Matt and Ben shot to fame after co-writing and starring in 'Good Will Hunting' together in 1997.

The movie earned them the Oscar for Best Writing in 1998.