Kacey Mottet Klein
- Birthday: 1998-10-20
- Place of birth: Lausanne, Vaud, Switzerland
- Also know as: 케이시 모텟 클레인
Kacey Mottet Klein is a Swiss actor. He made his screen acting debut at the age of ten in Ursula Meier's "Home", winning a Swiss Film Award for Best Emerging Talent. He followed this with another Swiss Film Award for Best Actor and a César nomination for the lead in Meier's "Sister".
