Hi guys; I was watching a movie and I found a really familiar actor in it. And I really want to know who he is. So please help me, any movie he's in or his name will help. thanks ^^

035%2BLucy%2B%25282014%2529.jpg

Is he listed in the movie credits?
He doesn't have a name in the movie, he's just a cameo appearance
What's the name of this movie where you saw him??
In LUCY! okay, his name is Frédéric Chau. French-Vietnamese actor :D

I remember his face, because two years ago he was in a french movie what was well known in europe! hahah or at least to me! Qu'est-ce qu'on a fait au Bon Dieu? is the title btw! 
Well, seeing as you apparently got this image from a page full of screencaps of the movie Lucy, I'm going to guess that's what movie it's from.  Would have made it easier to just post the name of the movie to begin with ;)

But anyway!  Check the full cast list on IMDb; maybe whoever it is is on there.  You'll probably have to do some cross-referencing since IMDb is not great about having complete filmographies and bios of Asian actors and actresses, but it's a place to start.