Watch 21 (2008) full movie online.
Synopsis: Ben Campbell (Jim Sturgess), a brilliant student at Massachusetts Institute of Technology, needs some quick cash to pay his tuition bills. He joins a group of students who, under the leadership of unorthodox professor Mickey Rosa (Kevin Spacey), use their math skills to win big in Las Vegas. Seduced by a beautiful teammate (Kate Bosworth) and loads of money, Ben learns that the stakes are higher than he ever imagined when he crosses paths with casino enforcer Cole Williams (Laurence Fishburne).
Director: Robert Luketic
Writers: Peter Steinfeld, Allan Loeb
Stars: Jim Sturgess, Kate Bosworth, Kevin Spacey
Sources: IMDB, Wikipedia