Evangeline Lilly says 'Ant-Man' is a ''heist film''.

The 35-year-old actress plays Hope Van Dyne in the upcoming Marvel movie but she insists it's not going to be a standard superhero romp.

In an interview with CNN, she said: '''Ant-Man' is very much a heist film. It has all the fun, tension and drama of a good heist film. The heist is being masterminded by myself, my father and Scott Lang.''

Evangeline's character is the daughter Janet and Hank Van Dyne, with the latter character being the original Ant-Man - played by Michael Douglas - who trains petty criminal Scott Lang (Paul Rudd) to take over the role.

The former 'Lost' star admits she was ''astounded'' by Marvel's creative process and admits shooting the film was a joy.

Evangeline - who can currently be seen in 'The Hobbit: Battle of the Five Armies' - said: ''I've been astounded to discover how good to their teams and crew that Marvel are. They're so collaborative, so smart with their stories. They have rich, dynamic characters which are so much fun to play. I expected I'd be a cog in the wheel of a big machine - I wasn't sure I'd like this experience. But I've been so astounded at how pleasurable the whole experience has been.''

'Ant-Man' is due to be released in cinemas on July 17, 2015.