Lucas Till will be rejoining the mutant corps in Bryan Singer‘s upcoming X-Men: Days Of Future Past, the director revealed today via Twitter. The actor appeared as young superhero Alex Summers AKA Havok in 2011′s X-Men: First Class and will fall in with a sprawling cast comprised of returning thesps from multiple X-Men film generations, including Jennifer Lawrence, Hugh Jackman, Halle Berry, Anna Paquin, Nicholas Hoult, Ellen Page, James McAvoy, Michael Fassbender, Shawn Ashmore, Daniel Cudmore, Ian McKellen and Patrick Stewart. Fox releases the pic May 23, 2014.