Taylor Kinney, 'Chicago Fire' actor and Lady Gaga's boyfriend, has opened up about monogamy in a new interview with E! and admitted that he thinks relationships can be long and fulfilling.

When asked if he believes in a marriage that can be happy and lasting, the heartthrob explained that his grandparents have an incredibly successful marriage and it inspires him in his own relationship: "I think so. My grandparents have been together for 50 some odd years. I know a lot of happy marriages."

Referring to his role as Mark in new movie 'The Other Woman', which sees him play a cheating husband with two mistresses, Kinney added that cheating is always a choice and hopefully people are more inclined to be faithful:

"If you're in a committed relationship, it's a choice what you do. Hopefully you don't take the route of Mark and just run amok...I think the idea of taking vows lightly or just marriage in general is a new thing. It's in the statistics; just look at divorce rates. People used to stay unhappy until death do you part, I guess."

Watch a trailer for 'The Other Woman' here: