Upon graduating in the 1950s, she began working in the animation paint lab of Disney Studios on films, including
Peter Pan. Later, she took a leave of absence to raise her four children. In 1973, she joined
Hanna-Barbera. Sullivan returned to Disney around 1987, animating such films as
Oliver & Company (1988),
The Little Mermaid (1989) and
The Prince and the Pauper (1990). In the 1990s, she painted
cels for
The Lion King (1994),
Pocahontas (1995),
Hercules (1997),
Tarzan and
Fantasia 2000 (both 1999). In the 2000s, she worked on ''
The Emperor's New Groove (2000), Lilo & Stitch and Treasure Planet'' (both 2002). == Personal life ==