Stephanie Corneliussen (Danish: ; born April 28, 1987) is a Danish actress and model, best known for her role as Joanna Wellick in Mr. Robot.

Early life
Corneliussen was born in Copenhagen. She attended Johannesskolen in Frederiksberg and studied ballet in Copenhagen. She has a degree in graphic design.

She was discovered at age 13 and encouraged to enter the Supermodel of Scandinavia contest, which was orchestrated by Jacqueline Friis Mikkelsen, the CEO of Unique Models, an international modeling agency based in Copenhagen. She won the contest and subsequently began her international modeling career. While still expanding her modeling career, she began studying in the United Kingdom in 2007, and in 2011 she relocated to Los Angeles.