Ashton Kutcher was spotted on a studio lot in LA this afternoon. He took a break from filming Two and a Half Men just as news came out that his wife, Demi Moore, filed for divorce. She announced the decision in a statement that alluded to recent rumors of infidelity, though didn't provide specifics on the cause of the split. Ashton and Demi shared many sweet moments during their six-year marriage, and Ashton tweeted earlier today that he "will forever cherish" the time he spent with his wife. The duo were famous for conversing over the social networking site with both of their handles referencing the other partner, but we'll have to wait and see if Demi changes her Twitter name, which is currently MrsKutcher.