Los Angeles, June 7 -- Actor Sarah Michelle Gellar has paid a heartfelt tribute to her former 'Buffy the Vampire Slayer' co-star Anthony Head following his death at the age of 72 due to complications from pneumonia, according to E! News.

Head, best known for portraying Rupert Giles on the hit supernatural drama from 1997 to 2003, was remembered by colleagues, friends and family after his daughters, Emily Head and Daisy Head, confirmed the news of his passing on June 5.

Taking to Instagram, Gellar shared a series of throwback photographs and an emotional message honouring the actor, who played her mentor and father figure on the series.

"'Tell Giles I figured it out and I'm ok,'" Gellar wrote, referencing a memorable line from the show....