Daniel Radcliffe, Emma Watson and more members of the Harry Potter cast are mourning costar Dame Maggie Smith, who died at age 89 on Friday. While audiences remember Radcliffe, now 35, as The Boy Who Lived and Smith as Professor Minerva McGonagall in the eight-film series,

Emma Watson has paid tribute to Dame Maggie Smith following her death. The 89-year-old actress passed away this week and Emma - who co-starred with Maggie in the 'Harry Potter' franchise from 2001 to 2011 - took to Instagram to remember the late star.