Frank Joseph Whaley is an American actor, writer, and director, whose best known work is in independently produced films. On House, M.D., he portrayed the "Mirror Patient", Mr. X in the Season 4 episode Mirror Mirror.
Whaley had featured roles in Ironweed, Field of Dreams, The Doors, Career Opportunities, Swing Kids, Fatal Deception: Mrs. Lee Harvey Oswald, Pulp Fiction, Swimming With Sharks, Broken Arrow, Red Dragon, The Dead Zone, School of Rock, Mrs. Harris, World Trade Center, The Hottest State, and Vacancy.