<Li> George Clooney as Bruce Wayne / Batman A billionaire industrialist who witnessed his parents' murder as a young boy . At night, Bruce becomes Batman, Gotham City's vigilante protector . Val Kilmer, who played the character previously in Batman Forever, was originally planned to reprise his role, but when he was cast in The Saint, which conflicted with his work schedule, the actor couldn't play Batman again and Clooney was cast . </Li> <Li> Chris O'Donnell as Dick Grayson / Robin The crime - fighting partner to Batman and ward of Bruce Wayne . He has begun to chafe against Batman's authority . </Li> <Li> Uma Thurman as Dr. Pamela Isley / Poison Ivy A botanist who becomes a crazed eco-terrorist after Woodrue attempts to kill her by pushing her into vials of chemicals, poisons and toxins, which replace her blood with aloe, her skin with chlorophyll and filled her lips with venom, making her kiss deadly . She also uses pheromones which make men fall in love with her . Julia Roberts, who worked with director Joel Schumacher in Flatliners, was heavily rumored to be in contention for the role, but the rumours were dismissed by Schumacher, saying that if she would have wanted to get the role, she would have called him . </Li> <Li> Alicia Silverstone as Barbara Wilson / Batgirl Her parents had previously died in a car accident . Alfred, her uncle, was very close to her mother, Margaret . She is Alfred's niece and is an orphan . </Li>

Who played poison ivy in batman and robin