The move to cast John Lithgow would mark a significant departure from the franchise’s long-standing tradition of casting British and Irish actors in major roles

HBO's series adaptation of "Harry Potter" may have found its Dumbledore. John Lithgow is close to closing a deal to portray the iconic character, according to multiple media reports. The series is expected to begin filming this summer in Leavesden.

US actor John Lithgow is reportedly set to take on the role of Dumbledore as the makers of the new Harry Potter TV series start to assemble their cast. Lithgow is known for starring in sitcom 3rd Rock Rrom the Sun,