Glynis Johns, known for her role as Mrs. Banks in "Mary Poppins," dead at 100

Actress Glynis Johns, best known for starring in the film "Mary Poppins," has died at age 100. 

The British actress died of natural causes on Thursday morning in Los Angeles, her manager Mitch Clem confirmed to CBS News. 

In her decades-long career, Johns earned an Oscar nomination for the 1960 adventure film "The Sundowners," and won a Tony Award in 1973 for the Stephen Sondheim musical "A Little Night Music," which featured her performance of "Send In the Clowns" — a song he wrote with her voice in mind.