Kate Winslet's publicist has confirmed reports the actress is a new mum, revealing she actually gave birth on Saturday (07Dec13) but insisted on keeping the baby news from the press for a couple of days.

The child, her third son, was born at a hospital in Sussex, England.

Her rep says, "Mother and baby are doing great."

The baby is the first child for Winslet and her third husband Ned Rocknroll, who she wed a year ago (Dec12).