'X-Men: Days of Future Past' Adding Omar Sy

The already impressive roster for X-Men: Days of Future Past is getting bigger.

French actor Omar Sy, known for his work in the acclaimed 2011 film The Intouchables, is joining the cast in an unspecified role. Director Bryan Singer shared the news on Twitter Saturday, where he called the actor "brilliant."

"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