There are just four days to go until the American football extravaganza that is the Super Bowl, but we're always more interested in the ads (and the half-time show) than the actual game.

Budweiser generally goes all out for its Super Bowl ads, but this year they've taken a different slant.

Rather than promote beer-drinking to viewers, they're instead warning people of the dangers of not drinking and driving. And in a genius move, they've employed Helen Mirren to get their message across.

"Hello, I'm Helen Mirren, a notoriously frank and uncensored British lady," she begins.

"If you drive drunk you – simply put – are a short-sighted, utterly useless, oxygen-wasting human form of pollution."

Tell us how you really feel, Helen.

The ad is part of Budweiser's #GiveADamn campaign, which is urging drinkers to never drive while under the influence.