The Eighth Day (1996)

I have been trying to get hold of this film again for a while, but copies are not exactly abundant.  It's a French-Belgian production about uptight businessman, Daniel Auteuil, who is a failure as a husband and father.  He comes across Georges who is mongoloid (I'm sure there's a PC word for this nowadays), who has run away from the home where he has been stashed away.  Reluctantly a bond forms between them and he becomes a better man.  The two leads shared the best actor award at Cannes; the actor playing Georges does suffer from the condition, but his is a virtuoso performance.  It's moving, sentimental, and manipulative but stays just this side of acceptable exploitation.  If you can stand watching handicapped actors, I do recommend it.