Kimberly Stewart and Calum BestKimberly Stewart and Calum BestThose celebs can't keep their love lives a secret for very long.

Especially when they give the game away by being seen with the same guy or gal over and over again.

Such is the case with Calum Best and Kimberly Stewart, who have finally confirmed they are a couple after weeks of rumours.

Ladies' man Calum was quite recently seen smooching with Bianca Gascoigne on Love Island - which they both won.

But he had no fear of PDA (that's Public Displays of Affection) when he was out with Kim at the MAC/Zandra Rhodes party in London's Silver club this week.

There's no word from they as yet, but a source told the Daily Mirror: "They were inseparable and sat snogging all night."

Ooh err.

Could this be love? We'll keep you posted.