Alyson Hannigan has shared a heartfelt tribute following the death of her Buffy the Vampire Slayer costar Anthony Stewart Head, who passed away at age 72 from complications related to pneumonia.
The 52-year-old actress posted an emotional message on Instagram on Saturday, June 6, expressing the profound impact of the loss. The two actors worked together for seven seasons on the cult classic supernatural horror series, with Hannigan portraying wiccan hero Willow Rosenberg and Head playing Buffy's watcher Rupert Giles.
In her public tribute, Hannigan wrote that the loss cut deeply and expressed gratitude for having Head in her life. She addressed him affectionately as "Tonal" and acknowledged struggling to find adequate words to honor his memory. The actress concluded her message with declarations of love and the recognition that she would miss him forever.
Sarah Michelle Gellar, who starred as the titular vampire slayer in the series, offered support to Hannigan in the comment section of the post, noting that Head had loved Hannigan dearly.
Head's daughters, Emily and Daisy Head, announced their father's passing on Friday, June 5. They described him as an extraordinary father who died peacefully while surrounded by family. In their statement, they expressed honor and privilege at being his daughters and witnessing the impact both he and his work had on countless individuals.
The sisters noted their father's deep love for his profession and his belief that he was incredibly fortunate to work alongside exceptionally talented people throughout a career spanning several decades. They acknowledged that he would be dearly missed by friends, colleagues, and fans of his various productions.
Numerous stars from Buffy the Vampire Slayer have shared remembrances of their late colleague. David Boreanaz, Eliza Dushku, James Marsters, and Emma Caulfield were among those reflecting on Head's life and legacy following the announcement of his death.
Dushku, 45, shared a message via her Instagram Story expressing gratitude for every scene and moment shared with Head, referring to him as "Tony H" and calling him "a dear one."
Gellar, 49, quoted an iconic scene from the series in her memorial message posted on Friday. She referenced a line about telling Giles she had figured things out and was okay, then admitted she had not figured it out and was not okay. The actress expressed gratitude for having known Head and thanked his daughters for sharing their father with her and the world.
The Buffy the Vampire Slayer community has experienced considerable loss in recent years. Michelle Trachtenberg, who portrayed Buffy's sister Dawn Summers, died from complications of diabetes mellitus at age 39 in February 2025. Nicholas Brendon, who played Xander Harris, died at age 54 in March from atherosclerotic and hypertensive cardiovascular disease, with acute pneumonia and previous myocardial infarction as contributing factors.
Head's portrayal of Rupert Giles, the knowledgeable and compassionate mentor to Buffy Summers, became one of the defining roles of his career. The character served as a father figure and guide throughout the series, which aired from 1997 to 2003 and developed a devoted following that continues to celebrate the show's cultural impact decades later.