- Grew up with famed actor Peter Graves as a neighbor.
- Was cast in his first role at age 11 in the educational film Why Johnny Can't Read.
- Harbored a well-publicized crush on his on-screen mom, Florence Henderson.
- Wrote Growing Up Brady: I Was a Teenage Greg, a tell-all which spawned a television movie featuring Adam Brody as Williams.
- Lost a celebrity boxing match in 2002 to fellow child star Danny Bonaduce.
- Has appeared in numerous stage productions including The Sound of Music, West Side Story and Oklahoma!.
- Brandon Eric Williams — Son
- Samantha Rose — Daughter
- Doris Blenkhorn — Mother
- Elizabeth Kennedy — Significant Other
- Diane Martin — Ex-wife
- Craig Blenkhorn — Brother
- Frank Millar Blenkhorn — Father
- Eila May Matt — Ex-wife
- Scott Blenkhorn — Brother
- Attended Pepperdine University, Malibu, CA
Season 8, Episode 3
- Birth Name: Barry William Blenkhorn
- Birth Place: Santa Monica, CA
- Birthday: September 30, 1954, Libra
- Profession: Actor