'Ellen': Justin Timberlake, Mila Kunis pop in to talk 'Friends with Benefits'

Gaga isn't the only high-wattage star scheduled to appear on Thursday's (April 28) "Ellen DeGeneres Show." Also stopping by -- Justin Timberlake and Mila Kunis, who co-star in the upcoming "Friends with Benefits."

Ellen asked the pair if they thought the idea -- having a no-strings-attached sexual relationship with a friend -- could really work.

Ellen: Do you think that (friends with benefits) can work?  Have you ever had a friend with benefits? Do you really think that can work?

Justin: It's a really good idea until it becomes a bad idea. It probably becomes a bad idea really fast.

Ellen: Yes, I would think that would really hard to do that in reality.

Justin:  I think that everybody could probably agree with us when we say, that if your going to be intimate with someone at some point somebody's going to feel something.

Ellen: Unless it's not...good stuff. (laughing)

Justin: That's still a feeling.

Ellen: If it's bad than no one's going to develop any feelings.

Justin: They'll develop a feeling but it's going to be, uh, uh.

Uh, uh indeed.

"Friends with Benefits" hits theaters on July 22.