Rebecca Rea Sugar (born July 9, 1987) is an American animator, screenwriter, producer, director, and musician. She is best known for being the creator of the Cartoon Network series Steven Universe, making her the first non-binary person to independently create a series for the network. Before branching off to work on Steven Universe exclusively in 2013, Sugar was a writer and storyboard artist on the animated television series Adventure Time. While working on the show, she was encouraged by the creative team to put her "own life experiences into the character of Marceline". She was an executive producer for Steven Universe for its entire run, and a storyboard artist for several of its episodes. The series premiered on November 4, 2013 and concluded on January 21, 2019. On September 17, 2023, Sugar announced on social media her first personal music album, Spiral Bound, which released November 3, 2023. Sugar has said it was challenging to write a song by herself, that she "didn’t know how to start" and decided to write original songs for a cartoon character she created, noted that previously she had made a lot of art out of a "quest for perfection" and self-destruction, and said that much of what she does at the present goes back to her time at the school. On June 4, 2025, Sugar announced her second album, Lonely Magic, with posts on social media featuring a short teaser animation detailing the album's release date of August 29th. She said that the album would have "true songs about magic."