Martha Michelle Rey is a 12 year old young girl (brand new animated character), who's honoring her late parents, Hans Augusto Rey & Margret Rey, and just moved from Hamburg, Germany to New York, Chicago with her filthy-rich-kind-hearted grandmother, Elizabeth Rey in a glittering mansion. Although she might been have shy before, but when she first met George (the chimpanzee) while taking her puppy Lil' Hundley out for a walk, she befriends with him and gets to meet George's monkey parent, The Man in the Yellow Hat (Ted Shackleford) for the first time in her life. Her favorite activities was drawing, sketching, music, singing, reading books, learning new things, making new friends, dancing and having fun (including worm racing and swimming). And she goes to same school as Daphne, Allie, Daisy, Troy, Vanessa and Scarlet during school days.
Her voice was portrayed by Ariel Winters, and she will first time appear in Curious George 4: A Birthday Rescue.