Organisers have also promised a strong focus on Scottish writing, with appearances by Scots language performance poet Len Pennie, and Damien Barr, the host of the BBC’s Big Scottish Book Club, among others.
The winners of the Wigtown Poetry Prizes and the Anne Brown Essay Prize for Scotland will also be announced.
Economist Prof Sir John Kay will deliver the James Mirrlees lecture, in honour of the Galloway-born Nobel-prize winner.
Adrian Turpin, the festival’s outgoing creative director, said: “Wigtown gives audiences the chance to enjoy famous names, new writers, great storytelling, big ideas and colourful characters in intimate surroundings at the heart of Scotland’s National Book Town.
“The festival prides itself on being friendly, laid-back, full of surprises and intensely curious.”