Thelma's first Oscar win for Best Film Editing was in 1982 for the film Raging Bull.
Thelma was the editor for the music video to Michael Jackson's song "Bad".
Thelma is a member of the Motion Pictures Editors Guild.
Thelma studied political science at Cornell University in New York.
Thelma was married to the Oscar nominated director Michael Powell from 1984 until his death in 1990.
Thelma won the Oscar for Best Film Editing in 2007, for editing The Departed.