Mekhi Phifer ( ; born December 29, 1974) is an American actor. He portrayed Dr. Greg Pratt on NBC's long-running medical drama ER until 2008 and had a co-starring role opposite actor/rapper Eminem in the 2002 feature film 8 Mile. He was a recurring cast member on the Fox crime show Lie to Me in the role of Ben Reynolds before season 3, and also starred as CIA officer Rex Matheson in Torchwood: Miracle Day. Early life Phifer was born in Harlem, New York City. He grew up in a single-parent household with his mother, Rhoda Phifer, a high-school teacher. Career In 1994, 18-year-old Phifer attended an open-casting call for director Spike Lee's Clockers, beating over a thousand others to get the lead role as a narcotics dealer embroiled in a murder cover-up. He followed that role with another in the comedy spoof feature High School High (which also starred his former wife Malinda Williams) and continued by co-starring in the horror film I Still Know What You Did Last Summer, starring Jennifer Love Hewitt and Freddie Prinze Jr. He also starred in the film Paid in Full in 2002. He portrayed Dr. Gregory Pratt on the NBC medical drama ER, which he introduced in April 2002. Phifer left the show in September 2008, in the first episode of Season 15. His character died during the conclusion of the season 14 finale cliffhanger involving an ambulance explosion that was rigged to kill an injured FBI informant (Steve Buscemi). During his six years in the show, he was nominated twice for an NAACP Image Award. Phifer's television credits include the movies The Tuskegee Airmen (1995), HBO's Subway Stories: Tales from the Underground (1997), and Brian's Song (2001 film) as former Chicago Bear Gale Sayers. He received additional notice for his performance opposite singer Beyoncé Knowles (from Destiny's Child) on MTV's alternative take on the Carmen legend with the movie Carmen: A Hip Hopera (2001). Phifer had a recurring guest role in the fifth and sixth seasons of Homicide: Life on the Street, portraying "Junior Bunk", the troubled nephew of Baltimore drug lord Luther Mahoney, and also guest-starred in New York Undercover. He earned an NAACP Image Award nomination for the TV movie, A Lesson Before Dying, opposite Don Cheadle. In 2009, Phifer began a guest-starring arc on the Fox drama Lie to Me. Among Phifer's other big-screen credits are Soul Food,