updated 11/18/2011 AT 9:00 AM ET
•originally published 11/18/2011 AT 10:45 AM ET
And that’s showbiz.
The dressed-down comedian, 33, was back to business for his debut season on the CBS comedy at the Warner Bros. studio lot in Burbank to play Walden, a recently divorced bachelor, who was written into the show when Charlie Sheen was fired from the hit series earlier this year.
“I will forever cherish the time I spent with Demi,” Kutcher previously said of the couple’s split. “Marriage is one of the most difficult things in the world and unfortunately sometimes they fail.”