Ivana Trump, Donald Trump's first wife and the mother of three of his children, has died aged 73.
"She was a wonderful, beautiful, and amazing woman, who led a great and inspirational life," Mr Trump posted on his social media platform Truth Social.
Ms Trump, who was born in what is now the Czech Republic, married the former president in 1977. They divorced 15 years later in 1992.
They had three children together - Donald Jr, Ivanka and Eric Trump.
Police believe the cause of death may be accidental, according to the Associated Press.
Sources told the news agency Ms Trump was found unconscious near a staircase at her New York City home, and it is believed she may have fallen.