Mr. Lawrence

On SpongeBob, he has provided the voice of Sheldon J. Plankton, Larry the Lobster, Fred, and various recurring characters since the show's debut in 1999.

Lawrence grew up in East Brunswick, New Jersey. In high school, he would appear in sketch comedy live shows during the summer. He attended The Kubert School for two years, before dropping out to focus on his stand-up. Lawrence started his animation career at Spümcø, where he was one of the few new hires alongside Peter Avanzino and Ron Hughart. He served as a layout assistant on the second season of The Ren & Stimpy Show and endured harsh working conditions under John Kricfalusi. He followed future showrunner Bob Camp and others to Games Animation, where he completed the rest of his work and switched to Joe Murray's unit. He became a major crew member on Rocko's Modern Life, voicing Filburt while directing and writing multiple episodes, a contrast to his minor role at the perpetually suffering Ren & Stimpy unit. After Rocko, he worked as a writer (and, since season 10, story editor) on the animated TV series SpongeBob SquarePants. He also has long-running character roles on the show, providing the voice of Sheldon Plankton and various recurring characters, such as Fred the fish, Potty the Parrot (replacing Paul Tibbitt from season 10 onwards), the Realistic Fish-Head, and Larry the Lobster. He has also voiced Plankton in the SpongeBob Movie in 2004, along with the other installments in the SpongeBob film series and spinoffs. Mr. Lawrence also wrote the story and screenplay for the Plankton: The Movie, which was released on Netflix in March 2025. He was the voice of Edward T. Platypus, Nurse Leslie, Dave, and Ping-Pong on Camp Lazlo. Lawrence also performed the voice of Manant in The Aquabats! Super Show!. Lawrence also worked as a producer on the television series Johnny Talk and as a writer on Rocko's Modern Life, The Twisted Whiskers Show and Mighty Magiswords. As a comedian, Lawrence performed in New Jersey and Los Angeles, collaborating with comedian Jeremy Kramer and Boston comedy writer Martin Olson. Jeff "Swampy" Marsh, a storyboard writer for Rocko's Modern Life and co-creator of Phineas and Ferb, described Lawrence as bearing a "unique sense of humor", and that one "would really have to know Doug to understand (or not understand)" his style. Marsh says that the rationale for Lawrence's humor techniques and decisions "remain a mystery to us forever."