Stars have taken to social media to share their memories of Nancy Reagan in tribute to the former US first lady, who has died at the age of 94.

Reagan, the widow of late president Ronald Reagan, died of congestive heart failure at her Los Angeles home on Sunday.

Her death has triggered an outpouring of tributes on Twitter from celebrities, politicians and everyday fans.

Arnold Schwarzehnegger described Reagan as a first lady who served with "unbelievable power, class and grace".


"Nancy Reagan was one of my heroes. She's with her Ronnie now, but those of us she left behind will miss her dearly," the former Governor of California said.

TV host and producer Melissa Rivers, daughter of late comedian Joan Rivers, wrote: "I am deeply saddened by the death of my Mother's good friend Nancy Reagan. She was a remarkable woman."

Politicians including candidates Hillary Clinton and Donald Trump joined in the tributes sending their condolences to Reagan's family.

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"Nancy's strength of character was legendary, and her advocacy especially for Alzheimer's research was tireless. Praying for her family," Clinton said.