Ratzenberger, who played fictitious Boston mail carrier on the popular sitcom "Cheers," replaces "The Sopranos" actor Vincent Pastore, who dropped out of the competition because of the strenuous preparation, People magazine said
"Vincent just turned 60 and he had a heart condition last year," show producer Conrad Greene told People. "Once he started training he said, 'Wow. What have I got myself into?'"
Ratzenberger, despite having only three weeks to rehearse before the show's March 19 premiere, plans to deliver on the dance floor, his representative said.
"He likes to cut a rug. People will be surprised," his publicist said.
Ratzenberger, 59, will be paired with professional dancer Edyta Sliwinska. He had been invited by producers earlier this year to participate in the show, but couldn't commit due to a scheduling conflict.