Family
- father Roger Williams: died in 1978
- mother Frances Faye Williams:
- step-daughter Sarah Pasquin: born c. 1967; Pasquin's daughter from his first marriage
- son Will Pasquin: born in 1987; adopted; adoptive father John Pasquin
- son Nick Pasquin: born in 1990; adopted; adoptive father John Pasquin
Companions
- Kevin Kline: dated briefly
