Maggie GyllenhaalMaggie Gyllenhaal is worried that filming High Falls with fiance Peter Sarsgaard may not have been a good thing for their relationship.

The couple play husband and wife in the short film but the characters hate each other.

Maggie said recently: “It was actually pretty horrible, to be honest. He was playing a big jerk and it was hard for me to be around him when all day long. We were in a terrible relationship in the movie, and it was really sad to have to pretend to be in that relationship for four days.”

“I love his acting and I would love to make many movies with him but I want to make sure that the making of the movie will be good for us, because I’m not sure that the making of High Falls was good for us.”

The couple got engaged in April last year and Maggie gave birth to their first child, a baby girl called Romana, in October.