Flash Entertainment

Keith Powell has denied suggestions that a lot of 30 Rock is improvised.

Powell, who plays Toofer, told Movieline that most of the show is "pretty scripted".

"I know sometimes when we're beginning or ending a scene, they might keep the camera rolling a little longer just to see if something spontaneous comes out," he said.

"But I'd say the show is about 98% completely scripted. There's not a lot of ad-libbing. It's very interesting, because the writers write it to sound like we're ad-libbing, but that's more of a testament to how good they are."

Powell also insisted that the actors do not compete with each other, saying: "We all come from slightly different backgrounds, so we all are kind of impressed with the ways we each approach the characters and work. I wouldn't say there's a competition. It's kind of great to watch these people work because all of us have different styles and approaches."