\n<\/p>\n
\t\t<\/p>\n Sarah Michelle Gellar<\/strong><\/a> shared a sweet birthday tribute to her Buffy the Vampire Slayer<\/strong><\/a><\/em> co-star Michelle Trachtenberg<\/strong><\/a>, who passed away in February of this year<\/a>.<\/p>\n Today, October 11, would have been Michelle<\/strong>\u2018s 40th birthday. <\/p>\n Keep reading to find out more\u2026<\/em><\/strong><\/span><\/p>\n The I Know What You Did Last Summer<\/em> actress shared a video of their Buffy<\/em> characters\u2014sisters Buffy and Dawn Summers\u2014hugging and wrote a touching caption to accompany the upload.<\/p>\n \u201cWhen you turned 16, it was hard not to still see you as the little girl I met on All My Children<\/em>. When you turned 21, I had to teach myself to not see you as the little sister anymore. I can\u2019t imagine what 40 would have been like. This I know\u2026 it would be filled with love. Happy birthday @michelletrachtenberg,\u201d Sarah<\/strong> wrote.<\/p>\n She also posted the clip on her Instagram story.<\/p>\n Some of Michelle<\/strong>\u2018s Gossip Girl<\/em> co-stars, like Leighton Meester<\/a><\/strong> and Penn Badgley<\/a><\/strong>, also shared tributes after her passing earlier this year.<\/p>\n <\/span><\/p><\/div>\n