Gustav Lorentzen
- Born
- 28 September 1947 (62 years old)
- Passed away
- 21 April 2010
- Place of birth
- Bergen, Norway
- Gender
- Male
Gustav Fredrik Lorentzen was a Norwegian musician, comedian and writer. He is best known to most as his alter ego "Ludvigsen" in the duo Knutsen & Ludvigsen (1970–1986).
