Lukas Jeremy "Luke" Crimbrook (born September 21, 1986) is an American percussionist. He is currently the drummer for the all-female metal band Ergo an Ogre. Lukas is also the younger stepbrother of Marco Simmer, who allowed him to contribute on the latter's third studio album, Episode 3 - Morbid Blade with a Cute Smile, although Crimbrook insisted on not being credited in the liner notes.
- Birthname: Lukas Jeremy Crimbrook
- Also known as: Luke, Doktor Crimson
- Born: September 21, 1986 (age 28); Oakland, California, United States
- Genres: Industrial metal, heavy metal, gothabilly
- Occupations: Musician
- Instruments: Drums, percussion
- Years active: 2009-present