Sarah Michelle Gellar, who played the eponymous Buffy, posted a selection of pictures of her with Head on Instagram.
"Thank you to Daisy and Emily who not only shared their dad with me, but with the world.".
David Boreanaz, who also starred alongside Head in Buffy, said: "RIP.
Fellow Buffy co-star James Marsters said: "He was an unflaggingly kind and steady presence on the set of Buffy, and the best actor in the cast...
Little Britain creator and star Matt Lucas described Head as "unfailingly brilliant, and always so kind and warm".
He also starred in Ted Lasso from 2020 as former Richmond FC owner Rupert Mannion, the ex-husband of Hannah Waddingham's character Rebecca Welton.
Head first found fame in the UK in the 1980s as the face of Nescafe coffee adverts on TV. »