According to Deadline, Vincent Cassel (Black Swan, Mesrine, Ocean’s Twelve and Thirteen) has been tapped as a last-minute addition to Summit’s now-filming Soviet thriller Child 44. The Cesar-winning thesp is replacing previously cast Philip Seymour Hoffman in the pic which has been filming since June under director Daniel Espinosa (Easy Money, Safe House). Tom Hardy, Noomi Rapace, Gary Oldman, and Joel Kinnaman also star in the tale of a military cop investigating a series of child murders in 1950s Stalinist Russia, adapted by Oscar-nominated Richard Price from Tom Rob Smith’s bestseller. Child 44 is the first book in Smith’s trilogy featuring protagonist Leo Stepanovich Demidov, played by Hardy in the pic. Ridley Scott is producing Child 44 for his Scott Free Productions with Michael Schaefer and Greg Shapiro. Pic is co-financed and exec produced by Worldview Entertainment, whose Christopher Woodrow, Molly Conners, Maria Cestone, Sarah Johnson Redlich are executive producing along with Douglas Urbanski. Lionsgate’s Erik Feig and Jim Miller are overseeing for the studio.