Altan are an Irish folk music band formed in County Donegal in 1987 by lead vocalist Mairéad Ní Mhaonaigh and her husband Frankie Kennedy. The group were primarily influenced by traditional Irish language songs from Donegal and have sold over a million records.

Mairéad Ní Mhaonaigh is an Irish fiddler and the lead vocalist for the Irish folk music band Altan, which she co-founded with her husband Frankie Kennedy in 1987. Ní Mhaonaigh is recognised as a leading exponent in the Donegal fiddle tradition, and she is often considered one of the foremost singers in the Irish language, her native tongue. She was part of the Irish supergroup T with the Maggies who performed in January 2009 at Temple Bar TradFest in Dublin their first ever two concerts under that name and who released in October 2010 their debut album. After nearly 22 years with Altan, on 28 December 2008 Ní Mhaonaigh premiered in Gweedore her debut solo album Imeall which was later released worldwide in February 2009. After 29 years with Altan, in October 2016 Ní Mhaonaigh released her alternate band Na Mooneys' debut album Na Mooneys.