Singer Olly Murs has reportedly been secretly dating his fitness trainer Melanie Sykes.
"Mel, 47, loves a younger man and really fell for Olly, 33, when he got into shape late last year," a source told thesun.co.uk.
Despite Murs and Sykes insisting that they are "just friends", the source said there is a "real physical attraction" between them.
They are said to have got close to each other after Sykes' fitness programme.
"They were initially introduced through a mutual friend. They started texting for ages and some of the messages ended up getting quite saucy.
"They were bonding over her fitness programme. He was a fan of her gym selfies and thought that she had an amazing body," the source added.