"They have known each other for years and have long had chemistry. Chris has been playing the field, and Kylie is single, so who knows what could happen," Grazia magazine quoted the a source as saying, reports femalefirst.co.uk.
Martin, 38, is said to have split from girlfriend Jennifer Lawrence, and while he believes there's still a chance for him and the "Hunger Games" star, Lawrence is considering getting back with her "reliable" former boyfriend Nicholas Hoult.
"As far as Chris is concerned, they are still together, but it's fair to say Jen feels torn. Chris hasn't exactly been consistent. Nicholas is a much more reliable presence," the source said.