John Travolta and his late wife have three children together, but eldest son Jett died in 2009

27 Jul – With Kelly Preston's last film finally releasing in theatres, the late actress' husband John Travolta recently took to social media to help her promote one last time.

On 23 July, the actor posted the trailer to Preston's movie, "Off the Rails", and wrote, "Off the Rails is Kelly's last film- she was very proud of it and of all of the wonderful talent that she got to work with in it."

Directed by Jules William and co-starring Jenny Seagrove, Sally Phillips, Elizabeth Dormer-Phillips, Ben Miller, Franco Nero and Judi Dench, the movie sees Preston playing an American named Cassie, one of three friends in their 50s who embark on an adventure across Europe to celebrate their recently deceased friend's last wish.

Their late friend leaves four train rickets for them on the condition that they take her teenage daughter with them.

Preston passed away in July last year at the age of 57, two years after being diagnosed with breast cancer.

The film was Kelly Preston's last one before her passing

Kelly Preston with husband John, daughter Ella and youngest son Ben