John Blyth Barrymore made his acting debut with a small role on his mother, Cara Williams' series, The Cara Williams Show.
John Blyth Barrymore was attacked in his home in 2002 by six teenage thugs in an attempt to steal marijuana plants he had growing on the premises. He was forced to undergo emergency surgery for critical cranial wounds, but fully recovered.
John Blyth Barrymore has been married twice. His first marriage was to Jaqueline Manes and produced son John Barrymore IV. His second marriage was to Rebecca Pogrow and produced two daughters. John Blyth's second marriage lasted from 1993-2002.
( Quote made by John Blyth Barrymore about his sister Drew Barrymore at the time of their father, John Drew Barrymore's competency hearing in 2003. )
John Blyth Barrymore: I don't know if Drew knows anything about this hearing. My father is in here a lot. I have tried to contact her through her people, as I don't have a contact for her directly. I would have liked for her to be here, but she just does not want to get into contact now. She is her own person and can do as she ways. My father was not very nice to her and maybe she thinks what she is doing is enough.