Lively, who arrived on the arm of husband Ryan Reynolds, made an entrance in a sweeping, dramatic copper look that featured a giant bow on her right hip. However, once she got in front of the photographers, a team of assistants unraveled the metallic leather fabric at the waist, revealing a green look underneath meant to reference the Statue of Liberty for tonight's theme of "In America: An Anthology of Fashion."
Lively even swapped copper opera gloves for green ones in a surprising style twist.
Her final look was embellished with crystals and featured art deco architecture from the Empire State Building on her bodice. Lively's train even had "a constellation from Grand Central Station" and "lots of little references" to the Big Apple, as she told E! News exclusively on the red carpet.
The transformation was truly breathtaking (check it in the video above!).
Lively completed her 2022 ensemble with a jeweled tiara and breathtaking diamond and emerald earrings.
Lively's double dress reveal will certainly go down in history as one of the most unexpected and epic Met Gala reveal moments ever.
Check out more of the most memorable Met Gala entrances below.
The 2022 bash is Lively's 14th time walking the Met red carpet and this year she's even a co-chair of the event.
In the past, Lively has worn everything from a blue Marchesa minidress to a plunging nude Gucci gown. She's also chosen to model Versace multiple times, from a jaw-dropping bejeweled crimson look in 2018 to a gold and blue option with a feathered train in 2017.