Movie star Matthew Mcconaughey prides himself on his dental hygiene and always carries toothbrushes so he can keep them clean.

The SAHARA actor stunned co-star Sarah Jessica Parker on the set of his new romantic comedy FAILURE TO LAUNCH with the whiteness of his teeth, and he puts it down to his brushing obsession.

He says, "I brush all the time. I have a toothbrush in my car, I have a toothbrush in my bedroom, bathroom, kitchen.

"I figure it's one of those things that, like water, or toilet paper... You can't do it too much."