Frank Permain Vosper (15 December 1899 – 6 March 1937) was an English actor who appeared in both stage and film roles and a dramatist, playwright and screenwriter.

[6][7] His extensive stage experience included appearing in his own play Love from a Stranger (1936), adapted from the short story "Philomel Cottage" by Agatha Christie.

[11] Banned by the Lord Chamberlain after a performance at the Strand Theatre featuring Atholl Fleming,[12] it remained unperformed until 1948, when it premiered at Wyndham's Theatre in London, with Miles Malleson, George Rose, Robert Flemyng and Kathleen Michael.

[13] Vosper drowned on 6 March 1937, when he fell from the ocean liner SS Paris.

[15][16][17] According to the Daily Express Fiction Library edition of Murder on the Second Floor, Vosper fell from the French ocean liner SS Normandie, while contemporary newspaper accounts and the evidence produced at the inquest stated it was the liner SS Paris.