The Light of Heart is a 1940 play by the British writer Emlyn Williams.

It ran for 127 performances at the Apollo Theatre in London's West End between 21 February and 8 June 1940.

The cast included Godfrey Tearle, Megs Jenkins, Gladys Henson, Elliott Mason and Angela Baddeley.

In 1942 it was adapted into the Hollywood film Life Begins at Eight-Thirty directed by Irving Pichel and starring Monty Woolley, Ida Lupino and Cornel Wilde.

[2] Twenty years later it was made into a West German film Life Begins at Eight starring Johanna Matz.