It all started in summer theater, when Sini was just a kid. Then, at nine, a teacher who loved movies showed her class The Sting and Magnolia. They put on plays, and for homework they shot short films on camcorders. That’s when she knew.

Originally from Finland, Sini moved to New York to study Acting for Film at the New York Film Academy and has worked for more than a decade in film, television, and theater. Some of her favorite projects have been Uncut Gems, The Blacklist, Asian Persuasion, The Sky Is Blue With Lies, King of Los Angeles, A Wilderness of Error, and False Positive. She has also appeared in many commercial campaigns for brands like Samsung, White Claw, Nick’s Ice Cream, Dannon Oikos, Cityrow, and Aveeno to name a few.

Sini also makes her own work. Her debut short film, Hustle, won Best Actress and Best Writing at festivals across the country. She is an executive producer on Deville (dir. Luca Pizzoleo), currently in production, and will next be seen in Choices (dir. Chris Brew) in 2026.

She is a classical pianist, a lifelong dancer, and trained in stage combat.