"Thrilled to welcome the brilliant #OmarSy from the amazing film #TheIntouchables to the cast of #Xmen #DaysofFuturePast!" Singer tweeted.

PHOTOS: 'X-Men: First Class’ Style Gallery

The follow-up to 2011’s X-Men: First Class, will reunite castmembers James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult. On Feb. 13, Singer announced Game of Thrones star Peter Dinklage was joining the cast in a role still being kept under wraps.

The film will also include appearances from the actors of the original X-Men trilogy, which was released from 2000-2006. Hugh Jackman, Patrick Stewart, Ian McKellen, Anna Paquin, Ellen Page and Shawn Ashmore are on board to reprise their roles.

Based on the iconic 1981 story in Marvel Comics' Uncanny X-Men, Days of Future Past will portray the original series stars as older versions of their characters in a dystopian future in which mutants are hunted down.

Days of Future Past, from 20th Century Fox, is eyeing an April start date and is slated for a July 18, 2014, release