He joins returning actors James McAvoy, Jennifer Lawrence and Michael Fassbender along with Sophie Turner, Tye Sheridan and Alexandra Shipp who are also new to the cast.
Bryan Singer is directing. Plot details are unknown.
Hardy’s role is unknown at this time but sources say the part is significant to the “X-Men” universe.
The pic bows on May 27, 2016.
Hardy is best known for his role on the BBC soap “EastEnders.” He is repped by WME, Untitled Entertainment and CAM.