X Factor host Olly Murs is said to be heartbroken after splitting from girlfriend of three years Francesca Thomas.

According to The Sun, the pop star and his property manager girlfriend have called it quits as their hectic work schedules made it difficult to juggle both their relationship and their careers.

A source is being quoted as saying: "The split has just happened and it is very raw for Olly, he still feels numb.”

Apparently Olly had been aware that their relationship would struggle as he always put his career first and the source added: "Now, with X Factor and his singing on the go, that's exactly what has happened."

The 31-year old had previously joked that his girlfriend was not a fan of his new physique. Speaking Fabulous magazine, Olly noted that Francesca wasn’t overly thrilled with his new slimmed down appearance:

"The missus doesn't like six-packs, so she's not a big fan. She misses the comfort belly, something to snuggle up to!"

His new healthy lifestyle came as a result of working out with a personal trainer four times a week and ditching takeaways for healthier meals in the run up to the new X Factor series.

The pair were together for three years and their alleged split has apparently come as quite a surprise:

"They worked so hard to keep their relationship strong, all their friends are stunned they couldn't make it work. Olly has kept himself busy with work to distract himself and took himself on a lads night out to see One Direction.”

As of yet, neither Olly or Francesca have commented on their relationship.