Leave it to Psmith is a comic novel by English author P. G. Wodehouse, first published in the United Kingdom on 30 November 1923 by Herbert Jenkins, London, England and in the United States on 14 March 1924 by George H. Doran, New York. It had previously been serialised, in the Saturday Evening Post in the US between 3 February and 24 March 1923, and in the Grand Magazine in the UK between April and December that year; the ending of this magazine version was rewritten for the book form.