The Crown, which dramatises the political and personal events that shaped the reign of Britain's late Queen Elizabeth, has eight nods at the annual British television industry awards, including four in the acting categories.
Smith opened up, stating, "The last two years of my life have been a difficult time and my intention turned inward and I read all the holy books, I've read the Quran cover to cover during Ramazan this year. This is the spiritual seeking phase of my life."
Kate, 42, spent two weeks in hospital in January after having what her office said was successful, planned surgery for a non-cancerous but unspecified condition.
The X-Men: Apocalypse and The Newsroom performer took to Instagram to tell followers her news, just days after she attended the Oscars ceremony with her partner, comedian John Mulaney.