The pair, who starred as tragic lovers in the 1997 blockbuster Titanic, along with the movie's director James Cameron, handed over the cash to ensure 98-year-old Millvina Dean can pay her nursing home fees, reports Access Hollywood.
Dean was the ship's youngest passenger at nine months old when the Titanic hit an iceberg and sank en route to New York in 1912. She is the ship's only living survivor.
Photographer Don Mullan made an appeal to help raise money for Dean in the Sunday edition of the Irish Independent newspaper, and also reached out to Winslet, DiCaprio and Cameron in a bid to raise awareness.
Mullan has already set up an exhibition to raise funds.
He explains to the publication, "I figured that if the edition sold out, it would secure Millvina for a full year. My plan, however, was to double the impact and thereby secure her for two years.
"I decided, therefore, at the opening of the exhibition, to publicly challenge James Cameron, Leonardo DiCaprio, Kate Winslet, 20th Century Fox and Celine to match me dollar for dollar."
According to reports, Mullan is still waiting to be contacted by Celine Dion, who won an Oscar for the movie's theme song "My Heart Will Go On. "
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