Chris Martin and Kylie's 'crazy chemistry'

Chris Martin and Kylie Minogue are said to have great chemistry.

The two music stars set tongues wagging last week when they were spotted arm-in-arm strolling through London in the early hours of the morning.

Despite the persistent rumours that Chris is close to Hollywood A-lister Jenifer Lawrence, sources say there's a spark between him and Kylie.

"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?" an insider told British magazine Grazia.

Chris shocked fans last year when he split up with wife of a decade Gwyneth Paltrow, in a move they dubbed "consciously uncoupling".

Not long after, he was linked to Jennifer. While they have never confirmed a romance, recent reports suggested that they were on the verge of moving in together. However his friendship with Kylie may have put a spanner in the works, as it has now been reported the pair have split.

"They were in their own little world, oblivious to anyone around them," an onlooker told British newspaper The Sun about Chris and Kylie's cosy walk.

Chris has also been linked to X-Files actress Gillian Anderson in recent months, while Jennifer was said to be getting close to her former flame Nicholas Hoult on the set of the new X-Men movie.

"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. Friends see it as a difference between the kind of man she wants and the kind she needs," a source recently told Grazia.