Keeley Hawes Louisa Durrell Actor Josh O'Connor Larry Durrell Actor Milo Parker Gerry Durrell Actor Callum Woodhouse Leslie Durrell Actor Daisy Waterstone Margo Durrell Actor Alexis Georgoulis Spiros Hakaiopolous Actor Yorgos Karamihos Dr. Theo Stephanides Actor Ulric von der Esch Sven Actor Simon Nye Writer Lee Morris Executive Producer Christopher Hall Producer Steve Barron Director