• Robin Williams publicity portrait for the film 'Good Morning, Vietnam', 1987. Picture: Getty Images.
    Robin Williams publicity portrait for the film 'Good Morning, Vietnam', 1987. Picture: Getty Images.
  • Robin Williams in a scene from 'Mrs. Doubtfire', 1993. Picture: Getty Images.
    Robin Williams in a scene from 'Mrs. Doubtfire', 1993. Picture: Getty Images.
  • Actor-comedian Robin Williams dances 10 July 1996 in Los Angeles with the Disney character “Genie” during a celebration for the scheduled 13 August world release of the film “Aladdin and the King of Thieves”. Picture: AFP.
    Actor-comedian Robin Williams dances 10 July 1996 in Los Angeles with the Disney character “Genie” during a celebration for the scheduled 13 August world release of the film “Aladdin and the King of Thieves”. Picture: AFP.
  • Academy Award-winning actor Robin Williams wears a clown nose as he places his hands in cement during his hand and footprint ceremony outside Mann's Chinese Theatre 22 December 1998 in Hollywood, California. Picture: AFP.
    Academy Award-winning actor Robin Williams wears a clown nose as he places his hands in cement during his hand and footprint ceremony outside Mann's Chinese Theatre 22 December 1998 in Hollywood, California. Picture: AFP.
  • Robin Williams sitting with Matt Damon in a scene from the film 'Good Will Hunting', 1997. Picture: Getty Images.
    Robin Williams sitting with Matt Damon in a scene from the film 'Good Will Hunting', 1997. Picture: Getty Images.
  • Actors-writers Matt Damon (L) and Ben Affleck (R) pose with actor Robin Williams with their Oscars they won for “Good Will Hunting” at the 70th Annual Academy Awards 23 March in Los Angeles. Damon and Affleck won Best Original Screenplay and Williams won for Best Supporting Actor. Picture: AFP.
    Actors-writers Matt Damon (L) and Ben Affleck (R) pose with actor Robin Williams with their Oscars they won for “Good Will Hunting” at the 70th Annual Academy Awards 23 March in Los Angeles. Damon and Affleck won Best Original Screenplay and Williams won for Best Supporting Actor. Picture: AFP.
  • Actor Robin Williams holds up his Oscar after winning in the Best Actor in a Supporting Role category during the 70th Academy Awards 23 March at the Shrine Auditorium in Los Angeles. Williams won for his role as a psychotherapist helping a troubled math genius in “Good Will Hunting.” Picture: AFP.
    Actor Robin Williams holds up his Oscar after winning in the Best Actor in a Supporting Role category during the 70th Academy Awards 23 March at the Shrine Auditorium in Los Angeles. Williams won for his role as a psychotherapist helping a troubled math genius in “Good Will Hunting.” Picture: AFP.
  • A file picture taken on November 15, 2005 shows US actor Robin Williams posing during a photocall of
    A file picture taken on November 15, 2005 shows US actor Robin Williams posing during a photocall of "The Big White" directed by Mark Mylod, in Rome. Picture: AFP.
  • US actor Robin Williams arrives for the European premiere of the animated comedy feature fim ‘Happy Feet’ at the Empire cinema, Leicester Square, London, 26 November 2006. Picture: AFP.
    US actor Robin Williams arrives for the European premiere of the animated comedy feature fim ‘Happy Feet’ at the Empire cinema, Leicester Square, London, 26 November 2006. Picture: AFP.