Michael John "Duke" Robillard is an American guitarist and singer. He founded the band Roomful of Blues and was a member of the Fabulous Thunderbirds. Although Robillard is known as a rock and blues guitarist, he also plays jazz and swing.

Roomful of Blues is an American jump blues and swing revival big band based in Rhode Island. With a recording career that spans over 50 years, they have toured worldwide and recorded many albums. Roomful of Blues, according to the Chicago Sun-Times, "Swagger, sway and swing with energy and precision". Since 1967, the group’s blend of swing, rock and roll, jump blues, boogie-woogie and soul has earned it five Grammy Award nominations and many other accolades, including seven Blues Music Awards. Billboard called the band "a tour de force of horn-fried blues…Roomful is so tight and so right." The Down Beat International Critics Poll has twice selected Roomful of Blues as Best Blues Band.