Talk about an entrance!
caused a few jaws to drop when she showed up unannounced to present the outstanding performance by a cast in a motion picture trophy at the Screen Actors Guild Awards on Saturday wearing a Spring 2003 Zac Posen gown.
Moore, whose appearance was shrouded in a little mystery, accentuated her slender frame in the black collared and ruffled vintage gown.
Stefanie Keenan/Getty; Djamilla Rosa Cochran/WireImage
The 53-year-old actress accessorized with silver and black drop earrings and pulled her hair into a high bun — save for a few, face-framing tendrils.
“What a wonderful surprise for me to see my pal #DemiMoore wearing her own vintage #ZacPosen gown from my second collection many moons ago while presenting at the #SagAwards tonight,” Posen proudly declared on Instagram, alongside a slow-mo video of the beauty taking the stage.
Moore apparently didn’t consult the designer before picking her look for the evening, but it’s clear she won his approval.
“The unbelievably beautiful #DemiMoore wearing her own vintage #ZacPosen gown at the #SagAwards tonight,” Posen added.
The actress continued to show off her timeless gown at the evening’s afterparties: a source tells PEOPLE she was spotted chatting with Marisa Tomei at The Big Short‘s table.
Do you think Demi belongs on the night’s best or worst dressed list? Tell us in the comment section.