There must be balance in the vampire universe; there is no good without evil, and now two key 'Twilight' vamps -- Edi Gathegi and Rachelle Lafevre (with mere mortal Taylor Lautner to balance them out) -- are spilling the beans on their characters and favorite moments on set in the hit phenomenon, in theaters Friday!

"I thought it was really funny the way we were always trying to be like these graceful gods," recalls Rachelle, "but we had these contact lenses in where you had tunnelvision, so you couldn't see anything around you. ... When [they'd] turn the cameras off, we would be stumbling around, with people helping us walk, and falling over."

Edi and Rachelle play bad vamps Laurent and Victoria, respectively, while Taylor plays Jacob Black, friend to Bella Swan (Kristen Stewart) who may have a surprise up his sleeve in later chapters...

Watch ET for more with the cast of 'Twilight'!