The Glee beauty stars alongside the heartthrob, who recently split from his wife of six years Demi Moore, and said Kutcher is the hottest guy in Hollywood, reported Daily Mail.
Michele separated from Broadway actor Theo Stockman in September after a 17-month relationship.
"I didn't mention Ashton's name just because, I got to say, I kind of felt like he was a little out of my league. You know, this guy's like, the hottest guy, and then when they called and said that Ashton was doing it, I was really freaked out.
"I thought I should have picked someone else and said, 'You have to use this person!' so I wouldn't have been nervous. But I'm so glad, because he challenged me, and it was a really great pairing, I think," Michele said.
Kutcher also enjoyed filming scenes with Michele where the pair are stuck in an elevator and found her to be great company.
"I think what makes her great for this particular role is she has this passionate aspiration and I think that she's able to express that really cleanly," he said.