Zachary Levi
Zachary Levi Pugh (; born September 29, 1980), known professionally as Zachary Levi, is an American actor, director, and singer. Known for his roles in the TV series Chuck as the titular character, Less than Perfect, Alvin and the Chipmunks: The Squeakquel and Tangled, he is to appear in the Marvel film Thor: The Dark World as Fandral in 2013.
source: Wikipedia