Dennis Hopper, battling prostate cancer, wants out of his marriage. The actor-director filed for divorce last week in Los Angeles, citing irreconcilable differences with Victoria Duffy, his wife of nearly 14 years, The Associated Press reports. Hopper, 73, has been battling prostate cancer and in October canceled all travel plans to focus on treatment. Hopper is seeking joint custody of the couple's 6-year-old daughter and offering to pay spousal support to Duffy. The "Easy Rider" star last year finished shooting the second season of "Crash," a TV version of the Oscar-winning 2004 film that airs on the Starz network. Hopper also has several film projects in the works. Phone and e-mail messages left for Hopper's manager, Sam Maydew, have not been returned.