Anthony Ryan Leslie (born September 25, 1978) is an American singer, songwriter, record producer, and entrepreneur from Washington, D.C. Leslie has produced singles for a number of prominent artists in a variety of genres, ranging from R&B, hip hop, pop and gospel. Artists Leslie has worked with include Britney Spears, Beyoncé, P.Diddy, JoJo, LL Cool J, Kid Cudi, Kanye West, Usher, Mary J. Blige, Chris Brown, Cory Gunz, Booba, Lloyd Banks, Fabolous, and Red Café.
From 2005 to 2006, he had his most commercial success to date with NextSelection/Bad Boy singer Cassie, when he wrote and produced her debut Platinum-certified hit single, "Me & U" along with her self-titled debut album. Leslie's 2008 self-titled debut album, includes the singles "Diamond Girl", "Addiction" and "How It Was Supposed to Be".
Leslie, who is a Harvard University graduate, is also the founder and CEO of SuperPhone and NextSelection Lifestyle Group. SuperPhone, a direct text marketing service, has been used by Miley Cyrus, Zayn, Joyner Lucas, Silk Sonic, and others. Leslie has been nominated for Grammy Awards, BET Awards, and Soul Train Music Awards.