An actor from HBO's The Sopranos has died of a self-inflicted gunshot wound.

John Costelloe, who played short-order cook Jim "Johnny Cakes" Witowski on the hit HBO series in 2006, was found dead in an apparent suicide on Dec. 18 at his Brooklyn, N.Y., home, Police spokesman Lt. John Grimpel confirms to the Associated Press.

Costelloe's character was the gay lover of mobster Vito Spotafore, portrayed by Joseph Gannascoli.

Police discovered his body after being called to the actor's residence when family members were unable to reach him.

Costelloe also stars as Warren Hurley opposite Meryl Streep and Philip Seymour Hoffman in Doubt, which is currently in theaters.