Roberta Day Quimby is a fictional character created by American children's author Beverly Cleary. Named after her father, Robert Quimby, Roberta is the youngest of three Quimby children; Beezus Quimby is the eldest and Ramona Quimby is the middle child. In addition to her mother, father and sisters, she also has an aunt, uncle and cousin. She is introduced in the book Ramona Forever, and is one year old in the last book Ramona's World. Roberta has a playful personality, and she seems to be taking after Ramona. She was played by twins Aila and Zanti McCubbing the 2010 film adaptation, Ramona and Beezus. There is currently no merchandise for Roberta, as she is a minor character.