Leslie Allen (29 August 1902 – 25 June 1996) was a Canadian saxophonist and vocalist popular in Britain during the 1930s.

[3] After returning to England in 1927, Allen spent the next five years playing and singing with several leading British dance orchestras (including those of Carroll Gibbons, George Melachrino and Geraldo) and making a number of freelance recording (including duets with Al Bowlly).

In 1932, he joined Henry Hall's BBC Dance Orchestra as a featured vocalist and enjoyed national hits with 'The Sun Has Got His Hat On' and 'Auf Wiedersehen, My Dear'.

Allen parted ways with Hall in 1934 and began a career as a solo act, scoring hits with 'Tell Me Tonight', 'Love Is The Sweetest Thing' and the children's ballad, 'Little Man You've Had A Busy Day' on which his wife, Anne and son, Norman had speaking parts.

After the war, he played the juvenile lead in the 1945 revival of "Miss Hook of Holland" before returning to Toronto in 1948, where he started a second career in the office supply trade, retiring in 1971.