<Tr> <Th> Box office </Th> <Td> $219.3 million </Td> </Tr> <P> 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 ." </P> <P> In New York City, high - strung equity trader Joy Ellis McNally is dumped by her fiancé at a surprise birthday party she throws for him . At the same time, easy - going carpenter Jack Fuller is fired from his job by his father, Jack, Sr. Both become emotionally distraught and, with best friends Toni "Tipper", a bartender, and Jeff "Hater", a lawyer, take a debauched trip to Las Vegas . </P> <P> Joy and Jack meet by chance when they are given the same hotel room because of a computer error . After clearing up the misunderstanding and receiving upgraded rooms and coupons to various clubs, they party and drink together and end up getting married . The next morning, they realize it was a mistake and decide to divorce . </P>

What is joy's job in what happens in vegas