Cast and crew members from all "Harry Potter" films reunite in a retrospective special to celebrate the 20th anniversary of Harry Potter and the Sorcerer's Stone (2001).Cast and crew members from all "Harry Potter" films reunite in a retrospective special to celebrate the 20th anniversary of Harry Potter and the Sorcerer's Stone (2001).Cast and crew members from all "Harry Potter" films reunite in a retrospective special to celebrate the 20th anniversary of Harry Potter and the Sorcerer's Stone (2001).