Ex Hex, Joanna Gruesome and The Mark Lanegan Band also join line-up
My Morning Jacket will be returning to the UK after four years to perform at The End of the Road festival.
The Kentucky band have not played in the UK since 2011 and are due to release their seventh album later this year.
Stealing Sheep, Eaves and H Hawkline have also been added to the festival line up, which is being headlined this year by Tame Impala, Sufjan Stevens and The War on Drugs.
The event takes place on September 4-6 at Larmer Tree Gardens in Wiltshire.
The festival will also include a celebration of Heavenly recordings’ 25th birthday. The label will be curating the Garden Stage on Saturday, bringing with them The Mark Lanegan Band to headline. St Etienne will also perform their 1991 album – and Heavenly’s first ever album – ‘Fox Base Alpha’ in full.
Previously announced acts on the bill include Future Islands, Django Django, Pond, Fat White Family, Sleaford Mods and Natalie Prass.
Full list of 2015 additions:
My Morning Jacket
Mark Lanegan Band
The Duke Spirit