Since you didn't specify which guy I included a link below of a picture of all the main guys. Here's there names from left to right;
Michael Trevino(Tyler)
Matt Davis(Alaric)
Zach Roerig(Matt)
Steven R. Mqueen(Jeremy)
Paul Wesley(Stefan)
Ian Somerhalder(Damon).
Then of course you have Joseph Morgan who plays Klaus.(not pictured)
Paul Welsey
Aidan played by actor Sam Witwer.
Chibi Vampire
the guy who played the vampire is "Kapil Dev" and the guy who plays the hero is Malayalam actor "Shafiq"
He is the blonde guy in the Lost Boys: The Thirst movie. He plays the first or alpha vampire. Pretty cute guy. :-)
Ryan Reynolds
Selena Gomez plays draculara and Miley Cyrus plays lagoona and demi lavato plays Frankie and david Henrie plays the fire guy and vannsea hugdens plays cleo de nile and Taylor laughtner plays deuce. hope i helped
Cam Gidandet
Actually he does. He plays one of the main bad-guy vampires in the original Buffy the Vampire Slayer movie that the tv show was based off of.
that drunk guy's name is Sam Quint and his name is robert shaw
Who plays Petergeist?Petergeist is the name of an episode.What are you asking?
He plays Brian Potter.