As founder and CEO of No Limit Entertainment, Miller at one time presided over a business empire that included his conglomerate No Limit Enterprises, No Limit Records, Bout It Inc., No Limit Clothing, No Limit Communications, No Limit Films, No Limit Sports Management, P. M. Properties, and Advantage Travel. Miller represented former NFL running back Ricky Williams when he was drafted by the New Orleans Saints; however, the deal was rated the worst contract for a player in NFL History by ESPN. Miller manages the music, film, and television career of his son, rap star Romeo Miller, as well as pop star Forrest Lipton and Atlanta rapper Gucci Mane. Miller was the executive television producer for his teenage daughter Cymphonique's Nickelodeon Show, How To Rock, and the co-creator of Romeo!, the hit Nickelodeon television show that stars his son.