Naomi Watts, Reese Witherspoon, Diane Kruger and Jessica Biel Look Lovely at Tiffany & Co. Event

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The hot blondes gathered together to celebrate Reese Witherspoon's 40th birthday.

Check out the bling on these gorgeous women!

Reese Witherspoon, Naomi Watts, Jessica Biel and Diane Kruger joined Tiffany & Co. in NYC on Friday at the unveiling of the jewelers’ 2016 Blue Book collection.

The event highlighted a continuation of Tiffany’s mastery in design and elegance, celebrating a collection into an exploration of nature –The Art of Transformation.

Witherspoon wore a $10,000,000 Tiffany & Co. Blue Book diamond necklace, $100,000 Tiffany & Co. Blue Book diamond ring, and Tiffany & Co. diamond earrings to offset her J. Mendel gown.

CREDIT: Getty Images

Watts accessorized her Prada dress with a $575,000 Tiffany Blue Book diamond cuff.

CREDIT: Getty Images

Biel wore a $1,500,000 Tiffany Blue Book diamond bib necklace with over 2,500 individually set diamonds and a $300,000 Tiffany Blue Book diamond bracelet with a white dress by The Row.

CREDIT: Getty Images

Kruger paired an aquamarine, tanzanite, green tourmaline and diamond $525,000 Tiffany Blue Book necklace with a red Kaufmanfranco dress.

CREDIT: Getty Images

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