Speaking to E Online, the 22-year-old revealed that she struggles with filming more intimate moments as it is "weird" to be watched by so many of the other cast and crew.
"It was great. [Jon]'s very lovely," she said.
"[But] they're never sexy. They're always really weird. There are a hundred people and a camera in your face. It's always kind of awkward."
However, she recently expressed frustration at the MPAA's decision to cut the racy scene with Hamm from the film's final product.
Sucker Punch opens Friday in US cinemas.
