ITV darlings Ant and Dec have managed to stay squeaky clean through all their showbiz years. "We're not really druggy people, that's the thing, " says Ant.

They were child stars of the TV soap Byker Grove in the 1980s. They became a pop act, PJ and Duncan, in the 1990s. Then they were the faces of the new ITV Saturday morning show, SM:TV Live.

That show was designed for kids but, as it happened, it became wildly popular with adults too.

For the past ten years, Anthony McPartlin and Declan Donnelly have hosted almost every ITV family entertainment show, from Pop Idol to Britain's Got Talent to I'm A Celebrity… Get Me Out Of Here! Incredibly, for two lads who look so fresh-faced, they are in fact in their late 30s.

Ant has been married for six years to his childhood sweetheart, Lisa Armstrong, a makeup artist. The Guardian journalist who interviews the pair today describes them as "freakishly clean". Have they never even tried taking drugs, she queries.

"Years ago, yeah," Ant admits, "but we're not really druggy people, that's the thing. I think you either go into that crowd as a kid or you don't, and we didn't. We found the love of alcohol very early on and we stayed with it." Dec: "There's a real pub culture where we're from in Newcastle, so we're just more boozy people."