Family
- step-daughter Nancy Horne:
- father William Howard Duvall: former US Navy admiral
- mother : amateur actor
- siblings : has two brothers
- step-daughter : has one other, grown
Companions
- Lindsay Crouse: involved in the 1970s
- Luciana Pedraza: together as of late 1996; Argentine; manages the restaurant he bought near his estate in Virginia; born c. 1972, she shares the same birthday as Duvall
