<Li> Casey Simpson as Ricky, is the second oldest of the quadruplets . He is the smart one of the group, always seen carrying a book or doing his homework . He is also a neat freak and a bit of a goody two - shoes, though he occasionally tries to prove to Dawn and his brothers that he can bend rules as well . </Li> <Li> Mace Coronel as Dicky, the third oldest and easy - going quadruplet who cares a great deal about his appearance . He always takes the easy way out . He ships himself to Australia in "Quadcodile Dundee". </Li> <Li> Lizzy Greene as Dawn, the oldest of the quadruplets . Although she's always seen bothering her brothers, she does care about them deeply . There is a consistent rivalry for the leader spot of the quads between her and Ricky . </Li> <Li> Gabrielle Elyse as Josie, a worker at Tom's sporting shop and babysitter for Nicky, Ricky, Dicky and Dawn . She only appears in the first season . </Li>

Who plays dawn in nicky ricky dicky and dawn