Washington, Sept 24: The production team behind US TV sitcom `Two and a Half Men' is reportedly missing actor Charlie Sheen and his jokes on the set.

Sheen, 46, was fired from the show due to his reckless behaviour and irresponsible lifestyle, which involved excessive alcohol and drug abuse.

Sheen has since been replaced by `Just Married' actor Aston Kutcher, who is said to be nice, but treated more like a step dad by the crew.

"With Charlie, we knew we could push his buttons and joke around about his personal life all the time. Ashton is all business and doesn't like to joke around with the guys about his life. It's off limits," Contactmusic quoted a source telling HollywoodLife. com

The source also added that Sheen would stand up to the show's co-creator Chuck Lorre a number of times so that the crew did not get the worst from him. But with Kutcher being very friendly with Lorre , it gets difficult at times to communicate. (ANI)