<Ul> <Li> Cillian Murphy as Thomas' Tommy' Shelby OBE DCM MM MP: The overall leader of the Peaky Blinders, and brother of Arthur, John, Ada, and Finn Shelby . Tommy served in World War I with the rank of Sergeant Major and was decorated for bravery . His experiences in World War I left him disillusioned and beset with ongoing nightmares . </Li> <Li> Helen McCrory as Polly (Elizabeth) Gray, née Shelby: The aunt of Tommy and his siblings, and treasurer of the Peaky Blinders . She led the organisation when Tommy, Arthur, and John were fighting in World War I. Polly's two children, Anna and Michael, were taken away from her as infants . In series 2, Polly reunites with her son but learns her daughter had died . </Li> <Li> Paul Anderson as Arthur Shelby, Jr.: The oldest Shelby sibling and the bulldog of the family . Arthur owns The Garrison . He also suffers from severe shell - shock or PTSD from his experiences in the war, and suffers from violent outbursts, constant mood swings, and attempts at suicide . Arthur is one of the leaders of the Peaky Blinders . </Li> <Li> Sam Neill as Chester Campbell (series 1--2): An Ulster Protestant Irish Major drafted from Belfast to locate and recover a missing consignment of Lewis guns accidentally stolen by the Peaky Blinders. Campbell was illustrious for his work in ridding Belfast of its gang elements . Campbell also had developed a vendetta against the Peaky Blinders, in particular, Tommy Shelby, and vowed to destroy Tommy and the Peaky Blinders . </Li> <Li> Annabelle Wallis as Grace Shelby née Burgess (series 1--3): A former undercover agent and Ulster Protestant Irish woman working with Chester Campbell . She was undercover as a barmaid at The Garrison . </Li> <Li> Joe Cole as John Shelby (series 1--4): The third - youngest Shelby . He is a World War I veteran and is one of the Peaky Blinders' leaders . </Li> <Li> Sophie Rundle as Ada Thorne, née Shelby: The Shelby brothers' only sister . Ada is the only sibling not involved with the Peaky Blinders . She had a son with Freddie Thorne, whom she named Karl (named after Karl Marx). </Li> </Ul> <Li> Cillian Murphy as Thomas' Tommy' Shelby OBE DCM MM MP: The overall leader of the Peaky Blinders, and brother of Arthur, John, Ada, and Finn Shelby . Tommy served in World War I with the rank of Sergeant Major and was decorated for bravery . His experiences in World War I left him disillusioned and beset with ongoing nightmares . </Li> <Li> Helen McCrory as Polly (Elizabeth) Gray, née Shelby: The aunt of Tommy and his siblings, and treasurer of the Peaky Blinders . She led the organisation when Tommy, Arthur, and John were fighting in World War I. Polly's two children, Anna and Michael, were taken away from her as infants . In series 2, Polly reunites with her son but learns her daughter had died . </Li> <Li> Paul Anderson as Arthur Shelby, Jr.: The oldest Shelby sibling and the bulldog of the family . Arthur owns The Garrison . He also suffers from severe shell - shock or PTSD from his experiences in the war, and suffers from violent outbursts, constant mood swings, and attempts at suicide . Arthur is one of the leaders of the Peaky Blinders . </Li>

How is polly related to tommy shelby in peaky blinders