Reports suggest that Melanie and Olly bonded over their love of fitness. She also publicly praised the pop star in December past year, sharing a photo of Olly's track Flaws and writing: "Love this track @ollymurs you sound like an angel makes me want to cry x".
"Mel loves a younger man and really fell for Olly when he got into shape late a year ago", revealed a showbiz source to The Sun.
The source added: 'They were initially introduced through a mutual friend. "It's been a bit off and on and there's a real physical attraction between them", a source revealed to The Sun. He was a fan of her gym selfies and thought that she had an incredible body.
According to a source, the pair went on a string of dates after being allegedly introduced by a friend and bonding over their shared passion for fitness.
As you may know, Olly is 33 years old and Melanie is 14 years his senior at 47 but whether there's actually anything going on between the two remains to be seen.
Meanwhile, Olly laughed off rumours that he was dating Louisa Johnson earlier this year after they joined forces for duet Unpredictable.
OK! Online have contacted reps for Olly and Melanie for comment.
She also has two children from her first marriage to actor Daniel Caltagirone.
They were married in 2001 but the couple split in 2008 and divorced the following year.