Coldplay's Martin 'wrote songs with Hill'

Tim McGraw has sparked rumours that Chris Martin has been taking influence from country music, after revealing that his wife Faith Hill recently wrote a number of songs with the Coldplay frontman.

The two families are known to have become close after McGraw starred opposite Martin's wife Gwyneth Paltrow in the recently-released film Country Strong.

"My wife is a huge Coldplay fan, and they spent a lot of time writing songs," McGraw told a surprised Chelsea Handler during E!. "I don't want to start any rumours or anything, but I ain't heard any songs yet!"

Martin has previously collaborated with a number of artists outside of the rock genre, including rapper Jay-Z and pop singer Nelly Furtado.

Coldplay have spent the past two years working on their currently-untitled fifth studio album.