Dreamgirls star Jennifer Hudson's dramatic weight loss was big news last year.
But the singer and actress said she would have no problem gaining the weight she lost if the right movie role came her way.
"When I do films, it has to be led by something through me - like my passion for it," Jennifer said at a book signing in Atlanta.
"I just don't want to hop into anything. So if I commit myself to something, then it'll be worth it no matter what character it is."
Last week, Jennifer released I Got This: How I Changed My Ways And Lost What Weighed Me Down.
The book touches on how she has dealt with her weight issues throughout her career.
Jennifer is a spokeswoman for WeightWatchers and wants to remain physically fit along with her fiancé David Otunga, who is a professional wrestler.
They both want to set an example for their two-year-old son.
"We really didn't realise how important health was until we were adults," she said.
"We wanted to make sure we set an example for our son. He's health conscious, and I am health conscious."