Corey Stoll and Evangeline Lilly's characters in the upcoming Marvel film Ant-Man have been announced.

The cast of Ant-Man opened up Marvel's panel in Hall H at Comic-Con International by revealing major details about the upcoming movie.

Stoll will be the movie's major villain as Darren Cross, a former protégé of genius scientist Dr Hank Pym (Michael Douglas) who has since seized the elder's company.

Cross's jealousy of his mentor leads him to transform into Ant-Man's (Paul Rudd) nemesis Yellowjacket.

Lilly will be portraying Dr Pym's estranged daughter Hope Van Dyne.

Marvel Studios boss Kevin Feige said in a statement: "We've been fans of Evangeline for years, and couldn't be more pleased that she's agreed to join us on Ant-Man's journey to the big screen.

"We look forward to audiences learning more about her character when she joins forces with Hank Pym and Scott Lang in 2015."

Feige added of Stoll: "Corey brings depth to every role he plays. As a major part of the Ant-Man ensemble, we all wanted an actor who could be both cunning and sympathetic, and help create a character as dynamic as Marvel's best antagonists."

It was reported on Friday (July 26) that Patrick Wilson and Matt Gerald have left the project due to the delays caused by the departure of original director Edgar Wright and the hiring of his replacement Peyton Reed.

Ant-Man will open on July 17, 2015.