He is a prominent entertainment attorney, businessman, and former magazine publisher, best known for representing high-profile clients like , Stevie Wonder , and Michael Jackson’s estate . His wealth comes from legal fees, business ventures (including owning The Source magazine), music publishing rights, and real estate investments.
McMillan is perhaps best known for representing the artist formerly known as Prince (and later, his estate). In the early 1990s, he helped Prince negotiate a release from his restrictive contract with Warner Bros.