Margareta Pettersson is a Swedish actress who plays with Matt Damon in the feature film Downsizing, directed by Oscar-winning director Alexander Payne. Margareta plays the major supporting role of Solveig Edvardsen.

She has scenes with Matt Damon, Christoph Waltz, Hong Chau and Rolf Lassgård. Margareta has more than thirty years experience as an actress. She is known for always being very true in her roles, a strong presence on screen and she is also known as a comedienne.