In 2012, Oscar nominee Jessica Chastain wore $2 million worth of Harry Winston bling to the Awards ceremony.
Cameron Diaz dazzled in this $1 million Tiffany & Co diamond necklace.
Gwyneth Paltrow showed off a stunning Anna Hu Haute Joaillerie 'Hearts of Winter' cuff bracelet studded with 2,368 diamonds, worth $1 million.
Nicole Kidman's 150-carat 19th century Riviere necklace by Fred Leighton glittered on the red carpet at the 2011 Oscars.
Not to be outdone, Anne Hathaway wore a $10 million 94-carat diamond necklace by Tiffany & Co to the 2011 ceremony.
Meanwhile Amy Adams wore $1.35 million worth of Cartier gems. The 30.75-carat carved emerald and 575-diamond bracelet was paired with 2-carat diamond stud earrings, worth $35,000.
And Reese Witherspoon wore Neil Lane diamond and emerald jewellery worth $1 million.
At the 2010 Oscars, Kate Winslet chose to wear this $2.5 million yellow diamond necklace, paired with matching $975,000 canary diamond earrings and yellow diamond bracelets by Tiffany & Co.
Angelina Jolie gave us an Oscar appearance wearing these 115-carat Colombian emerald drop earrings by Lorraine Schwartz, reportedly worth $2.5 million in 2009.
Nicole Kidman wore this custom-designed 'Sautoir' necklace by L'Wren Scott to the 2008 Oscars. The necklace is studded with 7,645 rough and polished diamonds weighing 1,400-carat and is apparently worth $7 million.
Gloria Stuart, nominated as Best Supporting Actress for her role in Titanic, wore this 15-carat blue diamond necklace worth $20 million in 1998. It's one of the most expensive pieces of jewellery every worn to the Academy Awards.
Elizabeth Taylor, who perhaps had one of the world's best jewellery collections, wore this 69.42-carat pear-shaped Taylor-Burton diamond, set in a necklace to the 1970 awards ceremony. Then, it was worth about $1 million. Click here to see Elizabeth Taylor's fabulous jewellery collection.