Surrounded by her family, the British actress passed away at the Chelsea and Westminster Hospital at age 89.
At just 54, while nursing a broken arm, she was diagnosed with Graves' disease.
“It just kind of leaps out at you.

It’s very, verysodemoralizing,” she said.
This movie was an immense hit at the international box office, earning almost a billion dollars.
“I think it’s the age I was when it happened.

It knocks you sideways.
It takes you longer to recover; you are not so resilient.
More impressively, she continued to film while undergoing treatment a resolution that was undoubtedly tough.

“I was hairless.
I had no problem getting the wig on.
I was like a boiled egg,” she quipped.
Finally, after two years, the actor beat cancer and faced her fears head-on, returning to work.
She would go on to star in"Downton Abbey"beginning in 2010.
In a November 2015 chat with TheTelegraph, Smith discussed the movie, its reach, and her health.
She also mentioned that she had a hip replacement surgery scheduled in the coming months.