Ellen-Ray Hennessey is a Canadian voice actress with a career spanning several decades in animation, live-action television, and film. She is also recognized for her extensive work in theatre, having performed in over three hundred theatrical productions, and for her contributions as an educator and author. In the realm of anime and animation dubbing, Hennessey has lent her voice to a variety of characters, often bringing a distinctive presence to her roles.

One of her notable contributions to anime dubbing is the role of Elfin in the English adaptation of the series Bakugan Battle Brawlers: New Vestroia. In this second season of the Bakugan anime, she provided the voice for the Aquos attribute Bakugan who is partnered with the brawler Marucho Marukura. Her portrayal of Elfin was featured in a number of episodes early in the season's run. She also voiced the character Beerain in the anime series Spider Riders.

Her other credits in English-dubbed anime include roles in more recent productions. Hennessey voiced the ancient serpent Jörmungandr in the fantasy comedy series Dragon Goes House-Hunting and portrayed Ichou in an episode of Suppose a Kid from the Last Dungeon Boonies moved to a starter town?. Her filmography also includes a role in the animated film Memories, where she voiced a mother character.

Beyond dedicated anime projects, Hennessey has an extensive body of work in other areas of animation. She is known within the My Little Pony fandom for voicing the character Mistmane in My Little Pony: Friendship is Magic, as well as Grandma Figgy in later installments of the franchise. Her voice can also be heard in numerous other animated series such as Arthur, Cyberchase, Hotel Transylvania, and Corn & Peg. In the video game industry, she provided the voice for Oyster Cookie in the popular mobile game CookieRun: Kingdom.

Throughout her career, Hennessey has worked with various studios and casting directors in the Canadian voice acting industry, leading to a pattern of recurring work on series for networks like Cartoon Network and in productions distributed by Netflix. Her long-standing career has been recognized with accolades including an Honorary Doctorate of Laws from the University of Windsor for her contributions to the arts and humanities. She has also served as a juror for the Daytime Emmy Awards for categories related to animation and voice performance.