Jessie Smither, Duchess of Leinster (25 August 1885 – 20 October 1960),[1] known by her stage name Denise Orme, was an English music hall singer, actress and musician who appeared regularly at the Alhambra and Gaiety Theatres in London in the early years of the 20th century.

Married, successively, to an English baron, a Danish millionaire, and an Irish duke, she was the maternal grandmother of Aga Khan IV.

After the birth of her first daughter, she returned to the stage in The Hon'ble Phil in October 1908, and as Lady Elizabeth Thanet in Our Miss Gibbs at the Gaiety Theatre, London.

Before their divorce in Tahiti in 1934,[22] they were the parents of one son, Hugo Wessel (1930–2012), a businessman and the first husband of Nina Van Pallandt.

[23] Bankrupt, the Duke remarried Vivien Irene Conner, a waitress, in 1965 before his death by suicide by taking an overdose of pentobarbital on 8 March 1976.