Glencairn Alexander "Glen" Byam Shaw, CBE was an English actor and theatre director, known for his dramatic productions in the 1950s and his operatic productions in the 1960s and later. Created CBE in 1954, he also received the Hon DLitt of the University of Birmingham in 1959.
In the 1920s and 1930s Byam Shaw was a successful actor, both in romantic leads and in character parts. He worked frequently with his old friend John Gielgud. After working as co-director with Gielgud at the end of the 1930s, he preferred to direct rather than act. He served in the armed forces during the Second World War, and then took leading directorial posts at the Old Vic, the Shakespeare Memorial Theatre and Sadler's Wells.