What actors and actresses appeared in Mr. Grinchie - 2008?

There is no movie called "Mr. Grinchie" released in 2008. It's possible you're thinking of "Dr. Seuss' Horton Hears a Who!" which was released in 2008 and features the character of the Grinch, albeit a different one than in "How the Grinch Stole Christmas".

If you can provide more details about the movie you're thinking of, I may be able to help you find the cast list!