Mekhi Phifer

Mekhi Phifer ( ; born December 29, 1974) is an American actor. He portrayed Dr. Greg Pratt on NBC's long-running medical drama ''ER'' from 2002 to 2008, and had a co-starring role opposite rapper Eminem in the 2002 feature film ''8 Mile''. He was a recurring cast member on the Showtime drama ''House of Lies'' , and also starred as CIA officer Rex Matheson in ''Torchwood: Miracle Day''. Phifer is also known for his appearance in the music video for "The Boy Is Mine" by Brandy and Monica. Provided by Wikipedia