Biography: Jeff Groth is an American film editor. He has worked with Todd Phillips on The Hangover Part III, War Dogs, and Joker. His work on Joker earned him a nomination for the Academy Award for Best Film Editing at the 92nd Academy Awards. Groth also edited Project X and The Wedding Ringer and worked on episodes of the television series Entourage, Community, and Ballers. Description above from the Wikipedia article Jeff Groth, licensed under CC-BY-SA, full list of contributors on Wikipedia.