Liam Neeson has returned to work for the first time since his wife died.

The grieving actor is back on the Canadian set of his upcoming movie 'Chloe', which he was filming when Natasha Richardson was injured during a skiing lesson on 16 March.

Neeson has reportedly "thrown himself" back into work, but film sources say he is having trouble hiding his grief when the cameras are off.

Representatives for Neeson have confirmed filming is now complete.

The 56-year-old actor dashed to be with Richardson after she was hospitalised in Montreal, before flying her to New York so family and friends could say goodbye.

The producers of 'Chloe' quickly rearranged filming schedules to allow Neeson to attend Richardson's funeral in New York on 22 March and to comfort the couple's sons — Micheal (13) and Daniel (12).

Natasha's sister, Joely Richardson, has also returned to work on US TV movie 'The Day Of The Triffids'.

Her mother Vanessa Redgrave has pushed a charity performance in New York back from April to October because she is too upset.