The pair, who have been hailed as one of Hollywood's most adorable couples, both posted the news to their social media accounts today.
"Anna and I are sad to announce we are legally separating. We tried hard for a long time, and we’re really disappointed," Chris shared to Facebook.
"Our son has two parents who love him very much and for his sake we want to keep this situation as private as possible moving forward. We still have love for each other, will always cherish our time together and continue to have the deepest respect for one another."