Rosie studied Fine Art at L'Ecole des Beaux Arts in Aix en Provence, and then Oxford's Ruskin School of Fine Art, before qualifying in medicine and practising as a GP.
Whilst studying on the 'Postgraduate Drawing Year' at the Royal Drawing School in Shoreditch, Rosie began illustrating for children. Rosie has since authored six books of her own, most recently The Itchy-saurus and The Very Hungry Hedgehog.