<Li> Justin Bartha as Douglas "Doug" Billings, the groom, who goes missing for most of the film </Li> <Li> Jeffrey Tambor as Sidney "Sid" Garner, Tracy's and Alan's father </Li> <P> The rest of the Garners are portrayed by Sondra Currie as Linda, Tracy's and Alan's mother; and Sasha Barrese as Tracy, Doug's bride and Alan's sister . </P> <P> The cast also includes: Mike Epps as "Black Doug", a drug dealer who is mistaken for Doug; Ken Jeong as Leslie Chow, a flamboyant Chinese gangster; Rachael Harris as Melissa, Stu's bossy, cheating girlfriend; Bryan Callen as Eddie, the wedding organizer; Rob Riggle and Cleo King as Officers Franklin and Garden, respectively; Gillian Vigman as Stephanie Wenneck, Phil's wife; Ian Anthony Dale and Michael Lee portray Chow's henchmen . Matt Walsh portrays Dr. Valsh and Dan Finnerty plays a wedding singer at Doug and Tracy's wedding . Todd Phillips, the film's director, appears as Mr. Creepy, who appears briefly in an elevator . Mike Tyson appears as himself; Tyson originally refused to appear in the film, but he changed his mind when he found out that Todd Phillips directed Old School, which Tyson liked . Tyson later said that working on the film convinced him to change his lifestyle . Mike Vallely portrays Neeco, the high speed tuxedo delivery man . Las Vegas personalities Wayne Newton and Carrot Top appear as themselves in the photo slide show . </P>

Who plays doug's wife in the hangover