What actors and actresses appeared in Welldigger - 2008?

You're likely thinking of the movie "The Well Digger's Daughter" (2011), not "Welldigger" from 2008. There doesn't appear to be a film by that name.

Here are the main actors and actresses who appeared in "The Well Digger's Daughter":

* Daniel Auteuil as "The Well Digger"

* Astrid Bergès-Frisbey as "Anna"

* Mélanie Thierry as "Marie"

* Laurent Stocker as "The Mayor"

If you're interested in other movies about well diggers, you can find those on IMDb or other movie databases.