Rap mogul Russell Simmons is dating a U.S. reality TV star less than half his age, according to U.S. reports. The 49-year-old Def Jam co-founder is reportedly romancing Star Search beauty Porschla Coleman, who is in her early 20s. The couple were friends for two months before they started dating six weeks ago, and have been enjoying nights out together in New York. Simmons filed for divorce from his wife Kimora Lee-Simmons in March 2006.