Justin de Villeneuve (born Nigel John Davies[1]) is a British businessman, known for being supermodel Twiggy's manager from 1966 to 1973.

De Villeneuve worked as a Mayfair hairdresser under the name Christian St.

From 1975 to 1977, he co-managed (along with his partner, Bryan Morrison) the British proto-punk rock band Doctors of Madness, led by Richard Strange.

[5] De Villeneuve married designer Sue Timney at Chelsea Town Hall in 2007.

[7] Nigel John Davies was born in 1939 in London's East End, within a mile of the Bow Bells.