Father, with Natalie Wood, of daughter Natasha Gregson Wagner.
Younger brother of Michael Craig.
Ex-brother-in-law of Lana Wood.
Has five children: daughter Sarah (b. 1958), daughter Charlotte (b. 1960) and son Hugo (b. 1962) with his first wife, Sally Ronaldson; daughter Natasha Gregson Wagner (b. 1970) with second wife, actress Natalie Wood; and daughter Poppy (b. 1984) with third wife, authoress Julia Gregson.
Lives in Wales.
Was Julie Christie's agent when he met Natalie Wood in September 1966. Christie at that time was being courted by Wood's ex-boyfriend, Warren Beatty.
Brother-in-law of Sue Walker.
In 1933 his uncle, Charlie Hanson, drowned, somewhat questionably, in the River Thames, his head bashed in.
Gregson's mother, Violet Hanson (1899-1999), was the paternal great-granddaughter of Sir Reginald Hanson, 559th Lord Mayor of London.
Father-in-law of Barry Watson.
Ex-father-in-law of D.V. DeVincentis.
Ex-son-in-law of Maria Gurdin and Nick Gurdin.