The festival takes place from September 17 to 19 on the island home of the malt whisky brand.
Three events will be staged at the Lagavulin distillery.
Nick Morgan, Diageo’s Scotch knowledge and heritage manager, said: “Crafted with skill, love and inspiration, live jazz and fine malt whisky are the best partners, enhancing enjoyment, relaxation, community and good companionship.”
Fiona Alexander of promoter Assembly Direct, added: “The festival is delighted to be supported by such a fine Islay whisky and iconic brand.
“Its virtues of quality, character, complexity and rootedness in its landscape are ones the festival aspires to.”