Cate Blanchett hit the Style Radar on Monday night in New York City, wearing a jaw dropping purple Armani Privè one-shoulder dress at a Giorgio Armani event for the Sydney Theater Company.  The powerfully purple number was a perfect fit for the slender actress, who never fails to impress us with her impeccable taste.

PHOTOS:  See Cate Blanchett, Olivia Palermo, Emma Roberts And Matt Dillon In High Fashion For Giorgio Armani, Armani Privè

Emma Roberts radiated electric youth in a multi-colored strapless mini, while The City’s Olivia Palermo opted for basic black.  Even Matt Dillon was dressed to impress.  What was he wearing?  Check out the gallery in Style to find out.

PHOTOS:  See David Beckham Shirtless For Armani

• TAGS

• Style
• Cate Blanchett
• Emma Roberts
• Giorgio Armani
• Matt Dillon
• Olivia Palermo
• Sydney Theater Company