Tasha Harris started her career at animation powerhouse Pixar as an animator on A Bug's Life (1998), Toy Story 2 (1999), For the Birds (2000, short), Monsters Inc. (2001), Finding Nemo (2003) and Cars (2006). She subsequently left Pixar and joined Double Fine Studios and created Tasha's Comic, part of Double Fine Comics - a project allowing Double Fine artists some creative freedom. She subsequently created the art for Tasha's Game, a free online flash game based on her comics. She was lead animator on Brütal Legend and during the Amnesia Fortnights held by Tim Schafer she conceived Costume Quest based on ideas of childhood nostalgia she was not able to implement while at Pixar. Harris also contributed animation to Iron Brigade and art to Sesame Street: Once Upon a Monster, two other titles that came out of the Amnesia Fortnights.
In 2011 she left Double Fine to rejoin Pixar as their lead franchise artist.