Among many other television series and films, he has also lent his basso voice to many film trailers and television commercials, including announcing for the "Toonami" and "You Are Here" blocks on the Cartoon Network. Cullen spent some of his early professional years in Montreal as a radio announcer/DJ on CKGM; and as a character in a then-popular local television kids show. He acted the role of a French-Canadian astronaut, along with writer and his partner on the show, Ted Ziegler. Both Ziegler and Cullen were in the supporting cast of "The Sonny & Cher Comedy Hour", as well as other network comedies of the era.