Marc Vann is an American actor, best known for Spider-Man 3, Ghost World, and U.S. Marshals. Other film credits include I Now Pronounce You Chuck & Larry, Art School Confidential, In Memory of My Father, Payback, Hoodlum, and Meet the Parents. 

Television credits include Agent Adam Fuchs on CBS' Criminal Minds, Conrad Ecklie on CBS' CSI, Doctor Ray on ABC's Lost, Doctor Sparrow on WB's Angel, Colin Maloney on BBC's Torchwood: Miracle Day, D.A. Scott Berger on ABC's Boston Legal, Terry Glazer on ABC's The Practice, and Phil Pritchard on CBS' Early Edition. 

Theater credits include Salvador Dalí in Hysteria, Del in The Cryptogram, Sackville in The Libertine, and Reverend Whitfield in As I Lay Dying (Steppenwolf Theatre); Oliver in Flyovers (Victory Gardens Theater); and Tyler in Light Up the Sky, Solyony in Three Sisters, Chris in All the Rage, and Dumaine in All's Well That Ends Well (Goodman Theatre).