The campaign announced Friday that Moore, who stars in the hit show “This is Us,” will join Buttigieg at a town hall in Ames on Monday.
Moore announced her support for Buttigieg last year, praising the Indiana Democrat as “my guy.”
“I think if you look at the Iowa polls, things just keep swinging in the right direction,” she said in November. “I’m so impressed with him. I think he’s overwhelmingly qualified, I think he’s brilliant and I love his message of unity.”
The appearance with Moore is part of a final sprint for Buttigieg toward the crucial Feb. 3 caucus in Iowa, where polling shows him locked in a competitive top tier.