Hugh Williams was a successful actor and dramatist. He collaborated with his second wife Margaret Vyner on several plays, such as "The Grass is Greener". His sons include the actor Simon Williams and the poet Hugo Williams, his grandchildren include the actors Tam Williams, Amy Williams and Kate Dunn and great-granddaughter is Lily Dizdar. His daughter Polly Williams, who died in 2004, was married to the actor Nigel Havers.