The actor, who stars alongside Aniston in the upcoming romantic drama, told The Late Show With Conan O'Brien that he loved working with the former Friends star.
"I thought we had a nice chemistry, she was wonderful to work with, beautiful, a wonderful actress as well and a good kisser," PA quotes him as saying.
He went on to dismiss tabloid rumours of an on-set romance with Aniston, saying: "I'm getting pressure from the press. When you're promoting a new movie they want to know if you've slept with your co-star, which I have not."
Love Happens opens September 18 in the US and October 9 in the UK.