Iconic US actress Mary Tyler Moore has died aged 80.

Iconic US sitcom actress Mary Tyler Moore has died aged 80.

Her publicist confirmed that Ms Tyler Moore, who is best known for her TV roles in The Mary Tyler Moore Show and The Dick Van Dyke Show died surrounded by family and friends, but did not reveal the cause.

New York Daily News reports the actress battled diabetes for decades and TMZ reported earlier Tyler Moore had been breathing with the assistance of a respirator in a Connecticut hospital for more than a week.

Mary Tyler Moore at the Annual Screen Actors Guild Awards 2012. (Image via Getty.)

Her publicist Mara Buxbaum described Tyler Moore as a "fearless visionary".

"Mary Tyler Moore passed away at the age of 80 in the company of friends and her loving husband of over 33 years, Dr. S. Robert Levine," a statement from Ms Buxbaum read.

"A groundbreaking actress, producer, and passionate advocate for the Juvenile Diabetes Research Foundation, Mary will be remembered as a fearless visionary who turned the world on with her smile."

Tyler Moore won several Emmys and Golden Globes and was nominated for Best Actress at the 1981 Academy Awards for the film Ordinary People.

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