The 25-year-old stars alongside Ashton, 33, who recently split from his wife Demi Moore, in the movie and was excited to work with him because he's out of her league.
Michele, who separated from actor Theo Stockman in September, told New York Magazine: 'I didn't mention Ashton's name just because, I gotta say, I kinda 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.'