Former Australian cricketer Shane Warne and his model fiancee Elizabeth Hurley have been at the centre of rumours of a possible split.

Reports have questioned the status of the couple's relationship due to a number of cryptic messages on Twitter and their failure to mention each other on the social networking website.

The pair are known to be active users on Twitter, with both announcing their engagement in October 2011 via their personal accounts.

However, widespread reports have suggested that the couple may have split following Warne's tweet where he failed to mention his fiancee while thanking friends and family after his 44th birthday celebrations.

Before his birthday, Warne also wrote: "It's not what happens in your life, it's how you react to what life throws at u, in both the good & bad times."

The pair were first spotted together in December 2010.