Hugh Anthony Glanmore Williams (6 March 1904 – 7 December 1969) was an English actor, playwright and dramatist of Welsh descent.
Born in Bexhill-on-Sea, Sussex as Hugh Anthony Glanmor Williams, his nickname was Tam. He trained at the Royal Academy of Dramatic Art. He was a popular film and stage actor, who became a major film star in the British cinema of the 1930s. In 1930 he toured America in the cast of the R.C. Sheriff play Journey's End and appeared in his first film Charley's Aunt during a spell in Hollywood. He then returned to Britain and became a mainstay of the British film industry. He made 57 film appearances as an actor between 1930 and 1967. He collaborated with his second wife on several plays, such as The Grass Is Greener and the screenplay for the subsequent film. He died from throat cancer, aged 65, in London.