Charlotte was born in Copenhagen on 13 July 1960. She began her career as an actress from the Statens Teaterskole in 1985. Sieling worked from 1985 to 1994 as an actor at various theatres, from the experimental stage to the Royal Theatre. The roles include Ophelia in Shakespeare's 'Hamlet' and Esmeralda in Victor Hugo's 'The Hunchback of Notre Dame'. Her roles in film and TV include the Swedish mini-series 'Rosenbaum' (1993), Jon Bang Carlsen's 'Carmen & Babyface' (1995), Carsten Sønder's 'Love, don't love (1995), and Jørn Faurschou's 'Dangerous Friendship ' (1995). This led her to apply to the Danish Film School, where she graduated as a screenwriter in 1995.
Nevertheless, Charlotte also started directing TV on DR. She was invited to Rejseholdet, where she stayed and made episodes for two years, and there she became a self-taught director for the next 12 years.
It was as head instructor at Krøniken for five years. Guest director on Forbrydelsen, conceptual director on The Bridge in Sweden and director on the third season of Borgen. The interest in the Bridge in the USA sent her to Los Angeles, where her American career took off. Featuring Homeland, Lovecraft Country, The Americans, The Strain and many more TV series. With this ballast, Charlotte recently returned home from filming her fourth feature film Way Out, who is in post production at the moment, and reach the audience in late 2024. Charlotte's four Danish feature films are:
"Over the Street Under the Water", "The Master" and "Margret the First" and soon "Way Out".