Victoria Duffy and Dennis Hopper

Dennis Hopper's wife is seeking full custody of their daughter in their divorce, The Associated Press reports.

Dennis Hopper files for divorce

Hopper, who's battling prostate cancer, requested joint custody of 6-year-old Galen in his Jan. 14 petition that cited irreconcilable differences. Victoria Hopper lists the same reason for the split in her response filing on Monday, according to court documents, but wants full custody of Galen.

Dennis Hopper starts experimental treatment for prostate cancer

The couple has been married for almost 14 years. Victoria is the Crash star's fifth wife, and Hopper, 73, plans to provide spousal support.