HBO has officially unveiled the cast for its upcoming "Harry Potter" TV series, featuring an ensemble of renowned actors stepping into iconic roles. John Lithgow, known for his work in "Conclave" and "The Crown," will portray Albus Dumbledore. Janet McTeer, recognized from "Tumbleweeds" and "The White Queen," is set to play Minerva McGonagall. Paapa Essiedu, acclaimed for his...