Cameron Diaz - once the ditzy blonde by appointment but now nudging thirty-something territory - is commodities trader Joy McNally.
She's humiliatingly dumped by her pompous boor of a fiance within earshot of friends she's gathered for his surprise birthday party.
Across town, serial slacker Jack Fuller (Kutcher) gets the push from his dad's furniture business and buries the pain knocking back the beers with his best buddy Hater (Rob Corddry).
Simultaneously, Jack'n'Joy hit on the idea of drowning their sorrows in American's desert party city par excellence - Las Vegas. Grating minds think alike.
However, after drunkenly hooking up and hitting the Strip (cue champagne in stretch Hummer), they end up getting hitched in a dimestore wedding chapel. Jack then goes onto win $3m...half of which is claimed by his wife of 12 hours.
Back in New York, a stern judge rejects requests to annul the marriage and tells the reluctant newly-weds they have six months to try to make things work.
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