James McAvoy has revealed that he based one of the multiple personalities he portrays in his film Glass on Saoirse Ronan.

In the M. Night Shyamalan film, McAvoy reprises his role as Kevin Wendell Crumb from 2016’s Split, a character who has over 20 personalities.

McAvoy starred alongside Ronan in the 2007 romantic war drama Atonement, the film for which she earned her first Oscar nomination.

“All of them had one driving characteristic. That was key to getting into them physically,” he said of getting into character on The Graham Norton Show.

I based one of the twins on a young Saoirse Ronan.”