Natasha Richardson's family is keeping a bedside vigil at a New York hospital following a skiing accident that left her with a serious head injury. The 45-year-old fell on the slopes while taking a ski lesson at Station Mont Tremblant near Montreal on Monday. She was taken to Montreal's Centre Hospitalier Laurentien, before being transferred to the nearby Hopital du Sacre-Coeur de Montreal with a 'traumatic brain injury.' The actress' husband, Irish actor Liam Neeson, rushed to her side on Monday from the set of his film Chloe, currently shooting in Toronto. Richardson was then flown via private jet, with Neeson by her side, to Lenox Hill Hospital in New York on Tuesday, at the request of her family. Her mother, Vanessa Redgrave, and sister, Joely Richardson, were both spotted entering the facility later on Tuesday to be at the star's side. A spokesman for Richardson declined to comment on her current condition as WENN went to press.