Diane Tell (born Diane Fortin, 24 December 1958 in Quebec City, Quebec) is a Canadian singer-songwriter. She first studied music (violin and classical guitar) at the Conservatoire de musique du Québec à Montréal and the Conservatoire de musique du Québec à Val-d'Or, then studied jazz guitar at Cégep de Saint-Laurent in Montreal. She started writing songs at the age of 12 and signed her first record deal at 18. She was probably the first female French Canadian singer songwriter to record her own songs exclusively. "Gilberto", her first hit song was a tribute to João Gilberto but it was "Si j'étais un homme" on her third album that made her a popular artist both in Canada and Europe. She moved to Paris in 1983 and now lives in Biarritz, France.

During her residency in France, she wrote songs with Boris Bergman, Maryline Desbiolles, Maryse Wolinski, Yann Moix and Françoise Hardy. She also participated in three original musicals, La légende de Jimmy, Marilyn Montreuil and recently Je m'voyais déjà.