Henderson comes from a musical family, with his sisters Megan (of Breabach)[4] and Ingrid and brother Allan (formerly of Blazin' Fiddles)[5] in particular being musicians of renown. He started learning the fiddle at the age of five under the tutelage of Aonghas Grant Snr.[6]
Besides fiddle, Ewen regularly performs on bagpipe, penny whistle and piano. He is also fluent in Scottish Gaelic and sings in the language.
Henderson is in high demand as a composer and created the soundtrack to the 2016 BBC Alba documentary "The Wee Govan Gadgies/ Pìobairean Beaga Bhaile Ghobhainn".[10] At 2017's Celtic Connections festival, Ewen Henderson was Musical Director of "Strì is Buaidh: Strife and Success",[11] a show covering Gaelic political music over the last 600 years.