UNDERWORLD star Kate Beckinsale relies on liquorice-flavoured breath mints when she has to pucker up for a big-screen kiss.

Beckinsale, who has kissed Ben Affleck, Hugh Jackman and LEONARDO DiCAPRIO on camera, always has some handy so her breath never smells when she's filming love scenes.

She explains, "They work, and you can always hand one to someone else. I used to use pure peppermint oil before a kissing scene, but I got it in my eyes once and the shoot was delayed for an hour after they puffed up."