Dunn made his way to New York City to perform in vaudeville. From there, he went on to Hollywood, where he appeared in twenty five motion pictures and more than one hundred television shows. Some of his appearances were uncredited bit parts.
While George Dunn never attained celebrity status, his long and steady acting career allowed him to travel around the world three times, visiting 95 countries. His world travels provided him with much fodder for humorous storytelling and entertaining after-dinner speaking engagements.