Cumming, 44, starred in the Broadway production of "Cabaret," as well as "Circle of Friends," "Emma," the "Spy Kids" trilogy, "X2: X-Men United" and "Titus." He was recognized with the OBE honor for his services to film, theater and the arts, and for his work as a gay rights advocate, the BBC said.
"I have a voice because of my work. I'm loud and I speak my mind," said the actor, who reportedly was clad head-to-toe in tartan for the occasion.
Cumming's husband, Grant Shaffer, also attended the ceremony along with his mother, Mary, and brother, Tom, the BBC said.