"What Happens in Vegas" follows the standard romcom design, giving us two funny, neurotic people who are in love with each other but don't know it. But by being a smidge smarter than the average date movie, it makes the first-time meeting, the battle of the sexes and the bumpy course of true love entertaining despite overfamiliarity.

Cameron Diaz and Ashton Kutcher are New Yorkers in need of a change. Ambitious Wall Street trader Joy (Diaz) has just been dumped in front of all her friends by her self-involved boyfriend. Slacker man-child Jack (Kutcher) has been shown the door at the family woodworking business by his own father.

Eager to forget their sorrows, they each zoom off to Sin City for a weekend of debauchery, where they meet, pound back kamikaze shots and marry just for the sheer drunken hell of it. Hung over, remorseful and awake to their utter incompatibility the next day, they resolve to divorce immediately. Then Jack uses Joy's quarter in a slot machine, wins a $3 million jackpot, and she insists the relationship is back on - until there can be a division of assets in court.

Since these events occur in a parallel universe of romantic contrivance, they land in the court of a judge (grouchy Dennis Miller) who threatens to freeze their bank account unless they make an attempt to save the relationship. With regular visits to a court-appointed relationship therapist, the judge sentences the accidental couple to "six months' hard marriage."

As they begin to set aside their selfishness and warm to each other, you can almost sense the widening smiles in the audience.

3 stars. Rated PG-13 for some sexual and crude content, and language, including a drug reference.