Hollywood actress Michelle Williams and Phil Elverum have separated after less than a year of marriage.

A source close to the couple, who requested anonymity because they were not authorised to comment on the matter, confirmed the split on Friday.

It was first reported by People magazine.

The 38-year-old Oscar-nominated actress and the 40-year-old musician were wed last July in upstate New York.

Vanity Fair Post Oscars Party – Mortons Restaurant
Williams has a daughter with the late actor Heath Ledger (Yui Mok/PA)

This was the first marriage for Williams, who has a daughter with the late Heath Ledger.

Elverum was previously married to the late musician and illustrator Genevieve Castree, with whom he has a daughter.

Williams is currently starring in FX’s Fosse/Verdon.

Elverum has recorded under the names the Microphones and Mount Eerie.