hmmm ... 
since many have been listed ...
i will highlight a few more

- Jrmie Renier (La Promesse) (1996) (Belgium) 
- Haley Joel Osment (The Sixth Sense) (1999) (USA)
- Jamie Bell (Billy Elliot) (2000) (UK)
- Vladimir Garin (The Return) (2003) (Russia)
- Freddie Highmore (Finding Neverland) (2004) (UK)
- Yuya Yagira (Nobody Knows) (2004) (Japan)
- Xiao Li Yuan (4:30) (2005) (Singapore)

I am not really sure if you like the following ...
I have NOT watched them ... so NO COMMENTS ...
but I know a lot of people like to list them ...

- Shirley Temple (hmmm ... i dont belong to the era ... * ;PPP *)
- Dakota Fanning (i think she can act, but she has appeared in too many screaming and crying films ...)

... let me think of some more ...

i am also wondering if any of you want to list these actors/actreses

- from Harry Potter (UK)
- from E.T. the Extra-Terrestrial (US)
- from Zozo (Sweden)
- from Innocent Voices (Mexico)
- from Children of Heaven (Iran)
- from Central Station (Brazil)
- from Cinema Paradiso (Italy)

etc