Winslet reportedly carried Branson’s 90 year-old mother, Eve, out of the home as flames blazed through early Monday morning.
"She (Winslet) was staying there with her children and in fact it was she who carried my mother out of the house," Branson told Britain's ITV News. "She swept her up into her arms and got them out of the house as fast as possible."
The fire broke out around 4 a.m. during a tropical storm, and lightning is said to be the cause.
Branson thanked the actress: “Many thanks to Kate Winslet for helping to carry my 90 year mum out of the main house to safety wondering when a Director was going to shout CUT!"
No kidding, this sounds like Titanic with fire.
Branson was staying on another property nearby with his wife and son, when lightning struck their main house.
“The main house is completely destroyed and the fire is not yet completely out. My office was based in the house and I have lost thousands of photographs which is very sad,” Branson said.
"We want to rebuild the house as soon as we can. We have a wonderful staff here and we want them to stay in work.
Branson owns the entire island. He bought it for $300,000 when he was 24 years-old.
"I wanted to build a home there that could be used by my family and friends for holidays, while keeping the island as unspoiled as possible,” Branson said of his purchase.
And at $54,000 a night, it’s been a preferred destination for many celebrities. Nick Lachey and Vanessa Minnillo recently tied the knot here, as did Jimmy Fallon and his wife. Victoria and David Beckham celebrated their tenth anniversary at Necker Island. It was also a favorite vacation spot of Princess Diana.
Situated in the British Virgin Islands, guests are picked up from nearby Beef Island by high-speed boat. And if that’s too much work, they can always travel by helicopter directly to the island.
"We'll all stay here for the time being. There's a lot of damage and we won't be able to stick it back together again right away. It was a beautiful house."