The British actress will be sporting a close cropped hair style for the road trip movie, which follows a retired married couple who head off on an adventure in a Winnebago (mobile recreational vehicle), defying the orders of their doctors and children.

Helen, who will star alongside veteran actor Donald Sutherland, isn't remotely worried about losing her locks for the role and in fact is looking forward to it.

"I'm about to have my hair cut," she tells Britain's Daily Mail newspaper. "I'm doing a film with Donald Sutherland - a sort of older person's road movie. I've never done that before so I'm kind of looking forward to it. It's exciting."

She admits she isn't a "hair person" and recommends women evolve their hair styles rather than keep the same look for years.

"They've done the same thing for the last 20 years and they're terrified of shaking it up. I shake it up all the time. I have to for work, which is a very good lesson," she adds.

The Leisure Seeker, based on the novel by Michael Zadoorian, was introduced to investors at the Cannes Film Festival this month (May16).

Helen also attended events during the film festival as a representative of L'Oreal Paris, and impressed on the red carpet, which she shared is a far cry from her first time at Cannes in her twenties.

The 70-year-old recalls, "I was so different then. I came with nothing. I was doing experimental theatre in Paris and arrived as a sort of actor-y tramp-type person... Warner Brothers were horrified. 'You can't go to Cannes looking like that!' They had to go out and buy me some clothes."

The festival concluded on Sunday (22May16).