The Heidelberg Laureate Forum Foundation presents the HLF Laureate Portraits: Charles Fefferman; Fields Medal, 1978. Interview recorded in 2019. In this series, join us as we meet with the top mathematicians and computer scientists – recipients of the Abel Prize, the ACM A.M. Turing Award, the ACM Prize in Computing, the Fields Medal, the IMU Abacus Medal and the Nevanlinna Prize. Marc Pachter (Director Emeritus of the National Portrait Gallery, Smithsonian Institute) sits down with the laureates to discuss their lives, their research, their careers and the circumstances that led to their awards. These interviews were produced for the Heidelberg Laureate Forum Foundation by the Berlin photographer Peter Badge. The opinions expressed in this video do not necessarily reflect the views of the Heidelberg Laureate Forum Foundation or any other person or associated institution involved in the making and distribution of the video. Background: The Heidelberg Laureate Forum Foundation (HLFF) annually organizes the Heidelberg Laureate Forum (HLF), which is a networking conference for mathematicians and computer scientists from all over the world. The HLFF was established and is funded by the German foundation Klaus Tschira Stiftung (KTS), which promotes natural sciences, mathematics and computer science. The HLF is strongly supported by the award-granting institutions, the Association for Computing Machinery (ACM: ACM A.M. Turing Award, ACM Prize in Computing), the International Mathematical Union (IMU: Fields Medal, IMU Abacus Medal, Nevanlinna Prize), and the Norwegian Academy of Science and Letters (DNVA: Abel Prize). The Scientific Partners of the HLFF are the Heidelberg Institute for Theoretical Studies (HITS) and Heidelberg University. More information on the Heidelberg Laureate Forum: Website: https://www.heidelberg-laureate-forum.org/ Facebook: https://www.facebook.com/HeidelbergLaureateForum Instagram: https://www.instagram.com/hlforum/ Twitter: https://twitter.com/hlforum Flickr: https://www.flickr.com/hlforum Blog: https://scilogs.spektrum.de/hlf/ LinkedIn: https://de.linkedin.com/company/heidelberg-laureate-forum-foundation