Rosie O'Donnell was delighted when "Empire" creator Lee Daniels invited her to guest star on the Fox drama, then got a case of nerves.
"I'd watched the performances, and I'm stunned every week because I can't believe the level of acting and the amount of (dialogue) and stories" in each episode, O'Donnell said.
Worried about "not being on my game," she worked with an acting coach before taping.
"I prepared for this like I've never prepared for anything in my career, because I didn't want to disappoint and I understood the pace at which they work," she said.
In the episode airing 9 p.m. EST Wednesday, O'Donnell plays Pepper...