Laine Mägi (born Laine Michelson-Adamson; February 3, 1959) is an Estonian stage, film and television actress, dancer and choreographer and dance pedagogue who began her career as a teenager. She is the founder of the Laine Mägi School of Dance, based in Pärnu.

Laine Michelson-Adamson was born in Kehra to Peeter and Elli-Anniki Michelson-Adamson (née Pennie). She has one brother who is two years younger. Her first cousin is actress Terje Pennie-Kolberg.