Sarah Michelle Gellar just shared a blast from the past for Buffy the Vampire Slayer fans ... colored prom dress she wore on the 1997 season 1 finale of the hit WB series, for an epic throwback ...
On Sunday, the “Buffy the Vampire Slayer” star stepped out at the Balenciaga ... while her glam matched the dark vibe of her outfit — featuring a smokey eye with lots of black eyeliner ...