Ben Foster filed for divorce from Laura Prepon, according to court paperwork obtained by In Touch on Tuesday. The Alpha Dog star, 44, filed the paperwork electronically, listing their separation date as September 9,

Ben Foster has filed for divorce from actor Laura Prepon in Tennessee, stating that they are 'unable to live together successfully as husband and wife.'

Here's why Ben Foster and Laura Prepon are divorcing after six years of marriage and a look at their divorce docs.