Actor/director Clint Eastwood did not submit prepared remarks of his attention-grabbing Republican National Convention speech to Mitt Romney's presidential campaign, a campaign adviser said.

“He went out and did what actors do sometimes, he did a little improv,” said Stuart Stevens, Romney’s chief strategist. “If someone wants to say this wasn't Clint Eastwood's greatest performance, have at it... Some people didn’t like 'Dirty Harry,' some people didn’t like 'Gran Torino,' that’s okay.”

Eastwood did not tell convention officials he would use a chair until moments before he took the stage, an adviser said, nor did they know until after his speech began that he would use the chair as an invisible Obama. Eastwood asked a stage hand to get him a chair, and the stage hand assumed he was going to use it to sit on.

While  Eastwood did not reveal the specifics of his remarks to the Romney campaign beforehand, advisers did discuss talking points with him before he spoke, including the mention of the 23 million Americans out of work or looking for employment.