Ben Affleck as George Reeves in Hollywoodland: Affleck's career got a boost when he played the onetime TV Superman who was ambivalent about his success in the role and who died under mysterious circumstances.

With films like Argo, Affleck demonstrated his behind-the-camera skills, but this film reminded us he is also a talented actor.

Geoffrey Rush as Peter Sellers in The Life and Death of Peter Sellers. The British actor renowned for his comedic performances in films such as Dr Strangelove was by all accounts a very difficult and jealous man as well as a very ill one, physically and psychologically. Rush captures the enigmatic character of Sellers well.

Michelle Williams as Marilyn Monroe in My Week With Marilyn: While the reliability of Colin Clark's memoir has been disputed, Williams' portrayal of one of the great screen legends is impressive even if it's hard to keep the real Monroe out of mind during this skilled imitation.

Rene Zellweger as Judy Garland in Judy: Zellweger's makeup, mannerisms and impressive singing voice all help sell her version of another screen legend.

Garland is shown near the end of her life when her addictions and financial, physical and mental health problems were taking a heavy toll.

Margot Robbie as Sharon Tate in Once Upon a Time...in Hollywood: Her role isn't large, but Robbie gives fellow actress Tate - who in real life was one of the victims of the horrific Manson "family" murders - a real sweetness and likeability

Michael Douglas as Liberace in Behind the Candelabra: Casting an actor whose heterosexuality was highly publicised might have seemed a safe move. But the idea of a biopic about the flamboyant gay pianist had circulated for years with Robin Williams among the names mentioned.

Douglas manages to avoid making Liberace too camp (no mean feat).