The actresses, joined by Diane Kruger and Naomi Watts, added a touch of A-list star power at a gala Friday in New York City to celebrate the jeweler’s 2016 Blue Book collection.
For the glamorous occasion, Witherspoon had on Jimmy Choo Pearl heels, and Biel donned Louboutins.
Oscar winner Witherspoon wore a black J. Mendel gown that featured a colorful sequin-embellished floral design along the skirt, and eye-catching baubles from Tiffany & Co., including a diamond necklace, a $100,000 ring and earrings.
Her open-toe Jimmy Choo Pearl platforms added a boost of height to her 5-foot-1-inch frame.
Styled to perfection, Biel had on a white Ikeda cold-shoulder dress by The Row, a $1.5 million diamond bib necklace with more than 2,500 individually set diamonds and a $300,000 diamond bracelet.
She completed the look with grey pointed-toe Christian Louboutin shoes.
The ladies posed alongside Watts, who was styled head-to-toe in Prada, and Kruger, who had on a KaufmanFranco gown.