Joseph “Joe” Walker (born February 6, 1987) was born in New York City, New York. He is a member of Team StarKid.

He is best known for portraying Voldemort in A Very Potter Musical, A Very Potter Sequel, and A Very Potter Senior Year. He also played Dick in Me and My Dick, Dolores Umbridge in A Very Potter Sequel, Commander Up in Starship, Batman and Chilly Willy in Holy Musical B@man!, Young Voldemort/Tom Riddle in A Very Potter Senior Year, Prince Achmed in Twisted: The Untold Story of a Royal Vizier, Tarkin in ANI: A Parody and Ducker in Firebringer.

Walker also starred in a YouTube comedy web series with fellow StarKid, Joey Richter, called Tasty Tests promoting Red Vines, the concept of a running joke during A Very Potter Sequel.

He has also starred in a Mountain Dew commercial, which also features Joe Moses, as well as a feature on an episode of Chicago Fire (Season 2, Episode 10: Not Like This; aired December 10th, 2013).