An Vrombaut was born in Belgium in 1967. She studied animation at the Royal Academy of Fine Arts in Ghent and at the Royal College of Art in London. Her graduation film, 'Little Wolf' (1992), has won many international awards including Best First Film at Annecy 1993. A second short, 'When I grow up I want to be a Tiger' (1996), was funded by the Mercedes-Benz Art Foundation and selected for the Berlin Film Festival.

In 1999/2000 An created and directed '64 Zoo Lane', a TV series for children. '64 Zoo Lane' was nominated for a BAFTA in 2000 and won the Best Pre-school Category at the British Animation Awards in 2002.

Her first picture book, 'Tiger!' was published in 1999. Since then she has written and illustrated 12 picture books, including 6 stories based on the TV series '64 Zoo Lane' and 'Smile, Crocodile, Smile' which won the 2003 Nottingham Children's book Award.

An has conducted workshops with young children at the Japan Kinderfilmfest in Tokyo and has also taken part in 'Meet the Animator' sessions at the Museum of the Moving Image in London. She regularly visits primary schools to talk about her books and films.

An lives in Harrow with her husband and two young children.