The 34-year-old actress donned a blunt blonde wig to truly look the part of Romy White while attended a couple of different A-list parties around Los Angeles on Friday.
Alba and her friend, Kelly Sawyer, rocked the shiny dresses worn by the lead characters during the movie's pivotal reunion scenes to George Clooney’s Casamigos Tequila Halloween Party in Beverly Hills.
"@kellysawyer n I invented post-its," Alba captioned an Instagram snap, referencing a famous line from the flick.
The pals were joined by Alba’s husband, Cash Warren, who also got inspiration from a classic movie for his Halloween costume. The 36-year-old producer dressed up as Maverick from Top Gun for the soiree.
Later in the evening, Alba and Sawyer stopped by Jared Leto’s house party, where they met up with the host, who was dressed as the Pope; killer cowgirl Gwen Stefani, who had also been at Clooney’s bash; and another ‘90s-loving reveler, Derek Blasberg. The Vanity Fair writer played the part of Dionne from Clueless for the night, and he made sure to snap a photo with this nostalgic crew.
“THE 90’S ARE FRIGGIN’ BACK!” Blasberg captioned the Instagram snap, posted on Saturday.