Kelly Preston is throwing herself into work to get over the tragic death of her son, femalefirst.co.uk reports.

The actress — who was left devastated when her 16-year-old son Jett with husband John Travolta suffered a fatal seizure during a family holiday in the Bahamas in January — has been filming tough scenes for new movie Casino Jack and it is helping her to deal with her grief.

The film’s director George Hickenlooper said: “She wanted to do this to get back to work. She talked to me about her loss. She is deeply affected by it and brought that to her character.”

Preston and Travolta — who also have an eight-year-old daughter Ella Bleu — are still trying to cope with the loss of Jett, who they recently held a private memorial for at their home in Florida.

A source said: “Both Kelly and John’s grief is raw and it’s going to take them a long time to recover from this.”

Earlier this month, it was revealed Preston will speak publicly for the first time about Jett’s death. She will address the California Governor’s Conference for Women in October, after being persuaded to by host Maria Shriver.