The 24-year-old Twilight actor was left shocked after he was attacked which left him with a broken nose. According to reports the actor was head butted and put into a headlock by a number of drunken men at the Twilight event.
According to The Daily Telegraph a source told them: "Bronson was really angry and upset. ... These guys were very nasty. They were so drunk they probably didn't even realise they were picking on a Hollywood actor.
"The convention was full of teenage girls and geeks desperate to see their Twilight heroes so no one expected this sort of trouble."
Police have released a statement saying that the four attackers were attending a wedding reception in the same hotel where the conference was being held and were chased by police offers where one of the attackers was restrained by a taser gun.
All four of the attackers were arrested on suspicion of assault but two were later freed without charge while two others were given bail while further investigations took place.
The actor cannot understand why the four men decided to attack him and is said to be nervous about attending more conventions.
For more on Bronson Pelletier, see Wolf Pack on Jay Leno and Wolf Pack on Bronzing.