Tiiu Kitsik is an Estonian-born children's book author and illustrator based in Berlin. She has created and illustrated numerous acclaimed picture books, many of which have received awards and international recognition.

She works across both traditional and digital media, including watercolour, oil pastels, and coloured pencils.

In addition to her own books, she collaborates widely with other authors and publishers, contributing illustrations, design, and visual storytelling to a variety of projects. Her work has appeared in magazines and exhibitions, and she is an active member of international illustration and design communities.