Family
- half-sister Chelsea Tallarico: Born in 1989; parents are Steven Tyler and designer Teresa Barrick
- half-brother Taj Monroe Tallarico: Born in 1991; parents are Steven Tyler and designer Teresa Barrick
- step-brother Rex Rundgren: Son of Todd Rundgren; Tyler considered him a brother as they were raised together
- step-brother Randy Rundgren: Son of Todd Rundgren; Tyler considered him a brother as they were raised together
- son Milo William Langdon: Born Dec. 14, 2004 in New York; father, English rocker Royston Langdon
- cousin : Referred to as Aunt Annie; active in Tyler's parenting in Maine; Tyler told Vanity Fair (May 1997) magazine, "I consider Aunt Annie my other mom"
- father Steven Tyler: Lead singer with Aerosmith; had eight month romance with Tyler's mother
- mother Bebe Buell: Had eight month romance with Steven Tyler in the midst of her involvement with rocker Todd Rundgren; lived with Rundgren c. 1971-79; also had relationships with Rod Stewart and Elvis Costello and was the inspiration for Costello's song "Party Girl"; former Playboy centerfold (1974)
- father Todd Rundgren: Had eight year relationship with Tyler's mother; listed as Tyler's father on her birth certificate; raised her until 1988
- step-father Coyote Stevens: Born c. 1967; Tyler's mother filed for divorce in 1998 after seven years of marriage; co-starred with Tyler in "Empire Records" (1995)
- half-sister Mia Tyler: Born in 1978; daughter of Steven Tyler and model Cyrinda Foxe
Companions
- Joaquin Phoenix: met during filming of "Inventing the Abbotts" (1997); broke up in fall 1998
- Royston Langdon: with band Spacehog; began dating in fall of 1998; announced engagement in February 2001; married on March 25, 2003 in the Caribbean
