Stu Milligan is an American actor and voice artist, born on September 10, 1953, in Boston, Massachusetts. While his career is extensive and based primarily in the United Kingdom, he has contributed his voice to a number of English-language dubs of anime series and films, particularly during the 1990s.

In the realm of anime voice acting, Milligan is known for providing the English voice for the lead character of Don Diego De La Vega, the titular hero in the anime series Kaiketsu Zorro. This English-language adaptation, produced for the European market, featured Milligan in this iconic role. His other work in English anime dubs from this period includes roles in projects such as Robin Hood no Daibōken and the film Patlabor: The Movie.

Beyond his specific work in anime, Milligan's broader career is marked by extensive voice work for BBC radio, where he frequently portrayed iconic American characters. He notably played the title role in the radio drama Superman on Trial and its subsequent series, as well as the Riddler in an audio adaptation of Batman: Knightfall. This skill for voicing established characters extended to video games, where he took on the role of Mr. Green in the CD-i version of Cluedo and provided voices for games like Pac-Man World 3 and Farscape: The Game. His deep voice has also led to him being cast in numerous on-screen roles, often as figures of authority such as military officers or American presidents, including appearances in the television series Doctor Who and the film Wonder Woman 1984.