‘Invictus’ star Matt Damon may be officially over the hill, but he’s happier with life now than he was 10 years ago, he says. The actor – who has daughters Isabella (4), Gia (2) and Stella (3 months) with his wife Luciana, and is stepfather to her daughter Alexia (11) – turned 40 last october and is so far enjoying the new decade. “It’s a good birthday – because a lot of the bigger questions are answered,” he says. “I’m married with kids, all the things I was worried about at 30, I don’t worry about any more.” While Matt is happy with his personal life, he admits there are still some professional aspirations he holds close, including working with close pal Ben Affleck again after collaborating on ‘Good Will Hunting’ in 1997. “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.”