X17 EXCLUSIVE - Ashton Visited By '70s Show Hottie Laura Prepon After Demi's Divorce Announcement

You'd never know this is a man who is about to get divorced from his wife of six years!

Ashton Kutcher received a visit from former That '70s Show co-star Laura Prepon while he shot Two And A Half Men in Burbank yesterday, and despite the fact that he's splitting from Demi Moore, Ashton couldn't stop smiling. Laura has known Ashton for years -- the two worked together from 1998 to 2006, and while we're not suggesting there's something romantic going on between these two pals, we haven't seen Ashton this happy in a long time!

"Ashton was in such a good mood when Laura was there — smiling and laughing," a photographer on the scene tells X17online exclusively. "She seemed to make him forget his troubles with Demi."

Laura visited for about 20 minutes in Ashton's private trailer, and we're not sure what she did to cheer up the 33-year-old star, but maybe he should hire her as his therapist!