Versatile Hollywood superstar Renee Zellweger is back to her singing and dancing best - as the actress prepares to play American icon Judy Garland in a new biopic of the international idol.

Renee ZellwegerRenee Zellweger will play the legendary Judy Garland

The last time Renee warmed her vocal chords for a role was musical crime comedy-drama film based on the stage-musical of the same name, Chicago, in which she starred opposite Richard Gere and Catherine Zeta-Jones as Roxy Hart - winning a Golden Globe for Best Actress in the process.

A promotional tweet released by the film company - entitled ‘Judy’ - showed a vastly different Renee as the titular superstar singer and actress.

The film is set during the winter of 1968 - a year before Garland’s tragic death at just 47 - at a series of concerts in London.

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Directed by Rupert Goold, 'Judy' picks up 30 years after 'The Wizard of Oz' - the star’s most famous role which she played at the tender age of 17.

The film focuses on Garland as she performs for sold-out shows at The Talk of the Town nightclub, while also struggling with demons in her personal life.

According to the film’s official synopsis, the mother-of-three "battles with management, charms musicians and reminisces with friends and adoring fans". She also finds love with Mickey Deans, who became her fifth and final husband.

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The synopisis continues, after more than 40 years in show business, the legendary star is "exhausted; haunted by memories of a childhood lost to Hollywood and gripped by a desire to be back home with her kids".

She was found dead in her home at age 47 from an accidental barbiturate overdose, just months after the tour came to a close.

'Judy' also stars Jessie Buckley, Finn Wittrock and Michael Gambon and is expected to be released sometime in 2018.