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Peter (Alec Baldwin) and Rita (Meg Ryan) immediately fall for each other and decide to get married. But during their wedding reception, a feeble old man (Sydney Walker) asks Rita for a kiss. While nothing seems wrong at first, Peter soon realizes that the kiss caused Rita and the man to switch bodies. As he searches for a way to switch them back, Peter must face the dilemma of loving Rita in the body of a terminally ill man or staying married to a stranger posing as his wife. Wikipedia