Actor Charlie Sheen has obtained his high school diploma. The Anger Management star was just a few points short of being able to graduate with his classmates at Santa Monica High School in 1983, so his parents urged him to stay behind to earn the extra credits. Sheen decided to embark on a Hollywood career instead, but admits he has always wanted to complete what he started more than 30 years ago. He tells TMZ.com, "It was a loose end that always bothered me. I just have this lifelong habit of never finishing things. "The idea my parents had was for me go to summer school. My response was: 'There's school during the summer? That's crazy!' I could think of nothing worse in my first summer of freedom after all that time. I told them, 'Let me go on some auditions and if it doesn't work out, I'll go and get my GED (a diploma equivalency test) and go to college.' But I got the first job I went on. It was Grizzly II: The Predator, that horrible thing." Now the 48 year old admits his certificate is one of his proudest achievements: "I'm gonna get a spotlight, cordon the thing off. I think it should be put up somewhere, maybe in the kitchen. This, I think, is important to put up."