The surprise speaker at the anointing ceremony of Mitt Romney wound up surprising the GOP presidential candidate's camp and the millions who watched, including Ann Romney.
"I don't think anyone could go as the way Clint Eastwood wants it to go, so we were just thrilled," she told NBC's "Today" show on Friday. "Frankly, I was thrilled for his support."
Eastwood also ignited the Twittersphere with his one-way conversation with an invisible President Barack Obama.
Here's a sampling of tweets in response to Eastwood's unscripted performance Thursday night at the Republican National Convention:
"This seat's taken."
— President Barack Obama, accompanied by a photo of the back of Obama's chair with him sitting in it.
"20 years ago I wanted Clint Eastwood to make my day. Now I just want him to take his pills and b grateful he doesnt need medicare."
— Nancy Lee Grahn, "General Hospital" actress.
"I demand to see Invisible Obama's invisible birth certificate."
— Michael Schaffer, The New Republic.
"Clint Eastwood made my day."
— Charlie Daniels, country singer.
"And so on this day, August 30, 2012, @MittRomney became a better actor than Clint Eastwood."
— Lawrence O'Donnell, host of MSNBC's "The Last Word."
"I can't believe I just watched #ClintEastwood turn into somebody's DRUNK UNCLE HARRY on the stage of the #GOP #RNC. He humiliated himself."
— Star Jones, "Today" contributor.
"I. Love. Clint Eastwood."
— Blake Shelton, country singer and judge on "The Voice."
"I heard that Clint Eastwood was channeling me at the RNC. My lawyers and I are drafting our lawsuit."
— comedian Bob Newhart, referring to his signature one-way-conversation routines.
"`If Clint Eastwood ever talks to a chair on national TV, people will need a way to reassure each other' — inventor of Twitter, March 2006."
— Patton Oswalt, comedian and actor on "The King of Queens."
"Clint Eastwood's RNC speech was to imaginary Obama in an empty chair. I'm drafting a DNC speech to imaginary Romney in an empty factory."
— George Takei, Mr. Sulu of "Star Trek."