Mekhi Phifer

Mekhi Thira Phifer (pron.: /mɛˌkaɪ ˈfaɪfər/; born December 29, 1974) is an American actor. He portrayed Dr. Greg Pratt on NBC's long-running medical drama ER and had a co-starring role opposite Eminem in the feature film 8 Mile. He was a regular on the Fox crime show Lie to Me in the role of Ben Reynolds, before season 3, and also starred as CIA agent Rex Matheson in Torchwood: Miracle Day.