
Birthdate: 5-8
Birthplace: Denmark
"It has been (of course!) wonderful to perform with you on stage again" - Caspar Phillipson (President J.F. Kennedy in Jackie (2016) and Maria (2024)).
Siff Andersson had an early breakthrough, performing in a musical adaptation of "A Midsummer Night's Dream" at the Danish theater Folketeatret. This led her to work alongside renowned actors such as Caspar Phillipson, Henning Jensen, and Trine Dyrholm-who, among others, recognized her place in the craft from the very beginning. Each of them left her a handwritten note, a personal keepsake she cherishes as a reminder of her journey:
"You are simply a great, great talent - a true actor (...)" - Henning Jensen (The Killing (2007), Flickering Lights (2000), and the Danish voice of Scar in The Lion King (1994)).
"You are so talented and professional (...)" - Trine Dyrholm (Queen of Hearts (2019), Love Is All You Need (2012), and A Royal Affair (2012)).
Siff is influenced by Method Acting and Cold Reading techniques, developing an instinctive, adaptable approach-one that allows her to fully immerse in a role while maintaining the spontaneity and responsiveness crucial for film and television.
In 2025, she advanced to the third round of auditions for a lead role in a major Danish feature film directed by Fabian Wullenweber. Alongside acting, she is producing the hybrid live-action/animation short film A Healing Hand (En Helende Hånd), directed by Freja Refning Hansen.
Siff earned recognition for her performance as Felicija in the psychological horror feature Victim of Love (2019), which garnered international attention. She won Best Supporting Actress at Nevermore Film Festival for her role.
Her training began at Eventyrteatret, a professional drama school for young actors, while performing at Tivoli in Copenhagen, The Royal Danish Theater, and Folketeatret. She later studied at The Actors Academy (Skuespillerakademiet) and The National Film Actors Academy (Det Danske Filmskuespillerakademi).
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