During an appearance at the Chicago Comic & Entertainment Expo, the Glee alum, 37, reflected on his groundbreaking portrayal of Blaine Anderson, an openly gay high school student, on the Fox dramedy.

recently retraced his roots on Glee by reuniting with co-star Mike O’Malley, who played Blaine’s father-in-law in the show. “Heckuva son-in-law,” wrote O’Malley in the post, which ...