|Cameron Diaz||Joy McNally|
|Ashton Kutcher||Jack Fuller Jr.|
|Treat Williams||Jack Fuller Sr.|
|Dennis Miller||Judge Whopper|
|Zach Galifianakis||Dave the Bear|
|Deirdre O'Connell||Mrs. Fuller|
|Queen Latifah||Dr. Twitchell|
During a wild vacation in Las Vegas, career woman Joy McNally and playboy Jack Fuller come to the sober realization that they have married each other after a night of drunken abandon. Besides that, there is a huge jackpot at stake. An implacable judge freezes the prize money and refuses to grant an annulment, so Joy and Jack must try to make their impromptu marriage work.