Kate Winslet Escapes House Fire on Vacation
08/22/2011 AT 12:50 PM EDT
The actress, 35, her boyfriend, Louis Dowler, and her children Mia, 10, and Joe, 7, escaped, along with 16 other guests from the eight-bedroom Great House on Necker, Branson's private island in the British Virgin Islands.
Branson told the AP that the fire broke out around 4 a.m. during a tropical storm. His son Sam, 25, helped guests evacuate, and the house was "completely destroyed" by the fire.
The cause of the inferno is still under investigation, but lightning is likely to blame.
Winslet's rep confirmed that the actress was unharmed.
Last month, Nick Lachey and Vanessa Minnillo were married on Necker island, saying their "I do's" just steps from the house that burned down Monday.