Despite his major role in the first installment, Quirrell never returns after his death. There is speculation that the role of Quirrell may be too minor for an actor of Murphy's caliber, considering he won the Best Actor award for Oppenheimer in 2023.

Cillian Murphy is part of the new generation of successful Irish actors, so it would make sense to be up for a role in the upcoming Harry Potter reboot series. The original film series boasted a series of highly esteemed British and Irish actors,

Though we don't have much to go on, Academy Award-winner Cillian Murphy is rumored to be up for a key villainous role in HBO's upcoming Harry Potter series - and it's not Voldemort!