With production on the Ant-Man sequel set to start next month, the film has moved to bring in a new cast member.

As per Variety, Hannah John-Kamen has joins Ant-Man and the Wasp in a yet-to-be-revealed role. The British actress will likely be best known to genre fans for the likes of Black Mirror and Game of Thrones, and she’ll soon be seen in Steven Spielberg’s Ready Player One and the Alicia Vikander-headlined Tomb Raider reboot.

Already confirmed to return for the film are Paul Rudd as Scott Lang/Ant-Man, Evangeline Lily as Hope Pym/Wasp, Michael Douglas as Hank Pym, Michael Pena as Luis, David Dastmalchian as Kurt, and T.I. as Dave.

To be directed once more by Peyton Reed, Ant-Man and the Wasp is currently set for a July 6, 2018 release. Before that, though, Rudd’s Ant-Sized Avenger will be a part of Avengers: Infinity War when that arrives on the big screen next April.