Colin Firth looked immaculate in an eco-friendly suit by Tom Ford in 2011 Oscars when he took home the Best Actor award for 'The King's Speech'.

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A look at formal fashion as worn by celebrities attending the Academy Awards over the past 50 years.

Colin Firth looked immaculate in an eco-friendly suit by Tom Ford in 2011 Oscars when he took home the Best Actor award for 'The King's Speech'. (Getty Images)

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Daniel Craig's suit made heads turn at the 2009 Oscars. Note the jaunty little slash of Craig's peaked pocket square and the styling of his shawl collar - classic, yet elegant. (Getty Images)

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Robert Pattinson sizzled on the red carpet in a slim-fit single breasted tux with shirt cuffs peeking out of jacket. (Getty Images)

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Hugh Jackman looked great in a white bow and a classic tuxedo. (Getty Images)

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Jude Law and Robert Downey Jr. carried an all-white ensemble and it looked nothing short of sheer classic styling ever. (Getty Images)

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Heath Ledger looked immaculate with a lapel pin that sparkled on the suit much like his to-die-for smile in 2005 when he was nominated for Best Actor for his role in 'Brokeback Mountain'. (Getty Images)

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Leonardo Di Caprio chose to show up at the Oscars in an extremely wide lapel suit in 1993. (Getty Images)

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Jack Nicholson accessorised his suit with sunglasses and beret in 1974 when nominated for his role in 'Chinatown'. (Getty Images)

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Experimenting a little with the self-tied bow tie, Marlon Brando added subtlety to his suit by pairing his shawl-collar tuxedo with a skinny bow tie. The shutterbugs could not have enough of Brando who clinched the Oscar for his powerful role in 'On the Waterfront' in 1954. (Getty Images)

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Humphrey Bogart's wide peak lapel, self-tied bow tie, and white pocket square with black piping, which he wore at the 1951 Academy Awards created a fashion statement which still rules the roost among the men strutting down the red carpet of the Oscars. (Getty Images)

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