Ch-ch-check out the tweets (below)!
[Image via Jason Merritt/Getty Images.]
Awwww, look at him trying to be all macho and shiz.
Zac Efron - with Master Chief - hosted the 'Halo 3' video game launch in Universal City, California, on Monday, night.
Later on this week, he'll be at the launch of a new makeup line for men called Zimply Zefron!