Extract from the review in Digital Sky:
In the hands of Hollywood, Untouchable could have been overly sentimental and clichéd (worryingly, a remake is already in the works), but writer/directors Nakache and Toledano strike gold with the casting of Cluzet and Sy. The latter invests Driss with a buoyant personality, expertly balancing pathos and a lightness of touch that's enough to ignite a spark in his new boss.
Cluzet, too, is excellent as the wheelchair-bound aristocrat, delivering an expressive performance with only his face. As he gradually becomes comfortable in the company of Driss, there's a sense that he's also getting more comfortable with himself, not allowing his wheelchair to hold him prisoner.