Plunging necklines, luxurious gowns decorate Oscars’ red carpet — PHOTOS

A pale yellow Louis Vuitton gown adorned with silver paillettes was one of the first looks to shimmer down the 500 foot-long stretch of carpet, worn by Alicia Vikander, nominated for best supporting actress in “The Danish Girl.”

“Just being here feels so surreal,” said the Swedish actress sporting a high ponytail. “I have butterflies in my tummy.”

“Modern Family” star Sofia Vergara brought va-va-voom to the red carpet in a plunging Marchesa dress in midnight blue, while “Star Wars'” Daisy Ridley sparkled in silver sequins in a V-neck Chanel.

In a similarly skin-baring dress, best actress nominee for “Brooklyn” Saoirse Ronan channeled her inner mermaid with a sparkling emerald Calvin Klein dress with an open back and dramatic V-neck.

Why the green? “I’m very proud to be Irish,” said the nominee, who also wore green when first nominated for an Oscar for “Atonement” in 2008.

Barely covered was Olivia Wilde — the bodice of her Valentino dress was little more than two narrow vertical panels — while a dramatic side split and cut-out diamond at the midriff of Rooney Mara, nominated for supporting actress in “Carol,” raised eyebrows.

Black may be a classic look for the Academy Awards, but blue was popular this year, including for nominee Sylvester Stallone’s tuxedo.

A royal blue silk Gucci with cascading ruffles was the choice of Brie Larson, the heavy favorite to win in the best actress category for “Room,” while Naomi Watts opted for blue sequins by Armani Prive.

“This has been my dream since I was seven years old,” Larson enthused before making her way down the phalanx of photographers.