Who's having a kissy?Talk about heat of the moment...

These two Hollywood actors have their lips on "go" mode.

They're calling on all their acting powers to create the perfect movie smooch.

The kind of knee-jerk moment that has audiences' hearts a-pounding, living the moment of true romance.

But it's no easy thing, a good on-screen kiss.

There you are, surrounded by film crew, with someone you may not know that well... and you're required to smooch the pants off them as though you can think of nothing or no-one else better.

And the big Hollywood names pictured here aren't the only people working their butts off in the kissing arena...

Titantic, Four Weddings & A Funeral, Dirty Dancing - these classic flicks feature some of our fave on-screen smooches.

So find out who these two pups are, along with snaps of other infamous movie snogs, in our gallery below.