Family
- father Henry Dwight Sedgwick: Divorced from Sedgwick's mother when Kyra was six
- mother Patricia Rosenwald: Divorced from Sedgwick's father when Kyra was six; re-married to Ben Heller
- great-grandfather Endicott Peabody: Founder of the Groton School; was Franklin Delano Roosevelt's headmaster at Groton
- step-father Ben Heller:
- uncle John Sedgwick:
- brother Nicco Sedgwick:
- brother Rob Sedgwick: Appeared in the film "Loverboy" (2005) alongside sister Kyra and brother-in-law Kevin Bacon (also directed)
- cousin Edie Sedgwick: First cousin once removed; star of Andy Warhol's early films and part of Warhol's Factory crowd; died of an apparent drug overdose in 1971
- son Travis Sedg Bacon: Born June 23, 1989; father, Kevin Bacon
- daughter Sosie Ruth Bacon: Born March 15, 1992; father, Kevin Bacon
