Instagram/Sarah Michelle Gellar & M Celebrity Sarah Michelle Gellar honors Michelle Trachtenberg one year after her passing, sharing memories from Buffy the Vampire Slayer and their 30-year friendship. April 6, 2026 AceShowbiz - Sarah Michelle Gellar paid a heartfelt tribute to her former co-star Michelle Trachtenberg on February 26, marking one year since her passing. Gellar reflected on their shared history, recalling their time working together on the iconic supernatural series Buffy the Vampire Slayer as well as the ABC drama All My Children.