Cameron Diaz and Justin Timberlake could be planning to marry on Valentine's Day, according to rumours in the New York Post.

The newspaper claims that Timberlake is visiting Las Vegas early next week, and friends of the star are convinced that he could be about to marry Diaz.

One friend explained, "The feeling is it may be a wedding. Everyone is splashing out on airfare to cover it."

Justin's ex Britney Spears married her childhood friend Jason Alexander in Las Vegas last year, but the marriage was over within 55 hours.