MIDDLEBORO — While he may be the assistant principal at Sippican Elementary School by day, Greg Thomas will spend the evening onstage at his next comedy show. 

Thomas will perform at the Boro of Laughs comedy show Sept. 20. The event will be held at the Alley Theatre at 133 Center St. as part of the Burt Wood School’s 30th anniversary celebration. Joining Thomas are fellow comedians Tom Stewart and Steve Sweeney. 

Along with performances in Boston and across New England, the principal-turned-comedian also produces shows, including comedy shows at the Alley Theatre.

Doors open at 6:30 p.m. for the 7 p.m. show. For more information, visit the Burt Wood School website.