What better way to start a classic Hollywood romance than the most modern of devices – the one night stand?

'Knocked Up' sees uptight control freak Alison paired with Ben, your classic Tinsel Town bum who lives off an old insurance claim and still house shares with his stoner friends.

The realisation that this is a match made in mismatched couples heaven strikes only after a series of mishaps and a nine month period.

Lesson learned: If you're a couple made in relationship hell with literally nothing in common then having a baby will fix everything (but don't try this at home!)