Moviemaker Joe Carnahan urged Liam Neeson to channel his grief over the death of his wife Natasha Richardson for an emotional scene in new movie The Grey.
The film focuses on a group of plane crash survivors who are stranded in the Alaskan wilderness, and Neeson plays Ottway, whose spirits are kept alive by the thought of reuniting with his wife.
In a crucial scene, his character pens a heart-wrenching letter to his loved one - and Carnahan suggested Neeson should think of his late wife Richardson to summon up the appropriate emotions.
He tells Empire magazine, "There's a letter that Ottway's writing to his wife, and I said, 'Write it to Natasha.' I wanted it to come from an innermost place... I think it's one of Liam's finest performances. It might honestly be his best."
Richardson died in 2009 after suffering a head injury in a skiing accident in Quebec, Canada.