It has been nearly 20 years since Mamma Mia! hit the big screen and proved that people will come out in droves to see a film adaptation of a hit Broadway musical, even if it centers around the music ...

However, not every performer's partner is comfortable with that — and they're not afraid to make their feelings known! Here are 13 celebs whose partners got jealous of their costars: 1. Ellen Pompeo's ...