What Every Woman Knows is a four-act play written by J. M. Barrie. It was first presented by impresario Charles Frohman at the Duke of York's Theatre in London on 3 September 1908. It ran for 384 performances, transferring to the Hicks Theatre between 21 December 1908 and 15 February 1909.

Clarence Charles William Henry Richard Bennett was an American actor who became a stage and silent screen actor over the early decades of the 20th century. He was the father of actresses Constance Bennett, Barbara Bennett and Joan Bennett with actress Adrienne Morrison, his second wife.