What happens in vegas has not only the trappings of a big expensive hollywood comedy the bright colors and nice sets but two big glamorous stars and they are not humiliated by being here because they do look very good and mismatch or not look good together too yes the script is lousy. What happens in vegas is a 2008 american comedy film directed by tom vaughan written by dana fox and starring cameron diaz and ashton kutcher the title is based on the las vegas marketing catchphrase what happens in vegas stays in vegas plot in new york city high strung equity trader joy ellis mcnally is dumped by her fianc at a . Critics consensus what happens in vegas has a few laughs but mostly settles for derivative romantic comedy conventions and receives little help from a pair of unlikable leads. What happens in vegas is fun mindless sort of comedy in which two total strangers jack ashton kutcher and joy cameron diaz meet in vegas get married after a drunken night of fun and then upon sobering up find out they have nothing in common and start the process of a divorce until jack wins 3m on a slot machine. What happens in vegas 2008 during a wild vacation in las vegas career woman joy mcnally cameron diaz and playboy jack fuller ashton kutcher come to the sober realization that they have