Mary-Kate Olsen is dowsing the flames of her rumoured pregnancy with a big bottle of vodka.

The Olsen twin - whose reported weight gain sparked rumours that she was in the family way - was spotted swigging vodka cocktails and puffing on cigarettes at a recent gallery opening. 

Mary-Kate and her boyfriend Nate Lowman attended the opening of The Station, an art exhibition in Miami before pounding down some high percentage drinks.

U.S. reports claim that Heath Ledger talked up the idea of having a baby to Mary-Kate before his tragic death in January.

But Mary-Kate's rep denies that the star was ever pregnant saying "there is absolutely no truth" to the claims.

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