Jonathan Gruber, more commonly known as J. Mackye Gruber, is an American screenwriter and film director, probably best known for co-writing Final Destination 2 and co-writing and co-directing The Butterfly Effect. Gruber always writes with a partner. He frequently collaborates with Eric Bress. Their most recent collaboration, Blindsighted, was released in 2010.Gruber is a graduate of USC School of Cinematic Arts. He has a background in cinematography.