Daniel Radcliffe, Rob Lowe, and George Takei were among the celebrities to remember the late actress, who died Friday at 89 ...

Emma Watson paid tribute to her Harry Potter costar Maggie Smith after news broke that Smith had passed away at the age of 89 ...

Millennials best knew and loved Maggie Smith for the sharp-witted characters she played in Harry Potter films, Hook, and Downton Abbey ...

The British actor, known for her portrayal of Professor Minerva McGonagall in the "Harry Potter" movies, died Sept. 27.