Future Islands and Arab Strap head up the new additions, with LA quartet Froth also joining the bill.
Cold Pumas, Helena Hauff, and Tale Of Us have also been announced to perform at the festival's 27th edition.
They join Interpol, PJ Harvey, The Jesus And Mary Chain, Soulwax, Ty Segall, Thee Oh Sees, Mac DeMarco, Angel Olsen, DJ Shadow, Black Lips, Idles, Car Seat Headrest, Foxygen, Parquet Courts, Yak, The Moonlandingz, Temples, and The Orwells.
La Route Du Rock takes place in the picturesque location of St Malo, France, with stages situated on the beach and in the awestriking ruins of the Fort Du Saint Pierre.
