Christian Slater, Gary Oldman and Dane Cook have joined the cast of Michael Winnick's GUNS, GIRLS & GAMBLING, reports HEAT VISION . The stylized thriller finds Slater joining an Elvis impersonator contest while drunk and ends up in a race for a stolen Indian artifact from the casino. Oldman plays a top Elvis impersonator and Cook a corrupt cop. Others looking for the missing treasure are Indians, modern cowboys, a 6-foot-tall blond assassin, a frat boy and a prostitute. Freefall Films is paying for the film, which starts production on July 6.