CAMERON DIAZ and ASHTON KUTCHER brought their new romantic comedy 'What Happens in Vegas' (in theaters May 9) to New York -- and ET's JANN CARL was with them for scoop on all things Sin City!

In 'What Happens in Vegas,' Cameron and Ashton play two down-on-their-luck strangers who hook up in Vegas and wake up the next day to find they got married! The one hitch, however, is that they can't stand each other. But when Ashton wins big playing slots with Cameron's quarter, the two find themselves connected by cash -- and scheming to get one another's money. Sentenced to "six months hard marriage" by a judge (DENNIS MILLER), can these two learn to get along -- and fall in love?