*Edi Gathegi is making a career transition from vampire to mutant.

Best known as soft-spoken vampire Laurent in “Twilight” and “New Moon,” the actor has just joined the growing cast of “X-Men: First Class,” according to E! Online.

Gathegi is set to play Darwin, the first “biracial mutant,” who has the power of “reactive evolution.” (In human-speak, it means he can adapt to any situation or environment.)

“For example, toss him in water, he grows gills. Drop him off somewhere in the middle of the night and he’ll develop night vision,” the website’s Gregory Imler writes. “And don’t bother trying to burn him…His skin will just become fire retardant.”

Edi joins James McAvoy, Alice Eve (“She’s Out of Your League”), Michael Fassbender (“Inglourious Basterds”) and Aaron Johnson (“Kick-Ass”) in the Matthew Vaughn-directed film, due in theaters next summer.