Harry Potter” stars Daniel Radcliffe, Rupert Grint and Emma Watson took to social media to honor their co-star Maggie Smith after she died last week at 89.

Radcliffe, for instance, remembers working with Smith before being cast in Harry Potter, having met her on the set of the BBC’s adaptation of David Copperfield when he was all of 9. Here’s his extended statement about her,

Beloved British actor Maggie Smith, who stole hearts in her portrayal of Downton Abbey’s Violet Crawley and Harry Potter’s Professor Minerva McGonagall, died on the morning of Friday, Sept. 27, at the age of 89.