Alexandra Posen is a graduate of Brown University and L'Ecole Jacques Lecoq in Paris. She studied physical and visual theater with an emphasis on mask making and puppetry, which led to a series of performance works in the late nineties at Theater for a New City, PS 122, and other venues. In 2000 she began her ongoing wax drawing series, FIELDS, and soon after co-founded Zac Posen, where as Creative Director she worked to establish the label as a global brand. Alexandra's extensive knowledge of couture fabric and technique has translated into a unique formal language in her abstract paintings. Beeswax persists as a dominant medium and language in Posen's work. In addition to making art, Posen writes and speaks about creativity and the artistic process.

Alexandra lives and works in Crown Heights, Brooklyn with her husband, artist Nils Folke Anderson, and her two children (also artists).