This is awesome! Not only that he got his diploma (at 42), but that he is making it his mission to help other kids in the situation that he was.
Here's a quote from the article he worte for Huffington Post:
“I was fortunate to find out I could attend high school online. For almost a year, I’ve been taking classes and studying any chance I could get – on the set, traveling for work and at home,” the 42-year-old actor told Huffington Post. “It has been both humbling and challenging, but I’m happy to report that I am officially a high school graduate, having received my diploma this summer.”