Anthony Ryan Leslie is an American recording artist and record producer from Washington, D.C.. Leslie has produced singles for a number of prominent artists in a variety of genres, ranging from R&B and hip hop to pop and gospel. From 2005–2006, he had his most commercial success to date with NextSelection/Bad Boy singer Cassie, when they released her debut single, "Me & U". Leslie's 2008 self-titled debut album, includes the singles "Diamond Girl", "Addiction" and "How It Was Supposed to Be".

Leslie, who is a singer, songwriter, rapper and entrepreneur, as well as a Harvard University graduate, is also the founder and CEO of SuperPhone and NextSelection Lifestyle Group. In 2011, he was nominated for a Grammy.

His parents are Salvation Army officers, who frequently relocate for work. Ryan's family are avid practicing Christians. Ryan has lived in various states, cities, and countries. At an early age, Leslie taught himself how to play the piano. He developed the ability to recite music, as well as arrange chords to create songs. At the age of 14, Leslie scored a 1600 on his SATs—a perfect score—while attending Bear Creek High School, in Stockton, California. In 1993, he applied to four University of California campuses as well as Stanford, Yale and Harvard. In his application essays he explained his interest in matriculating from his junior year in high school without having earned a diploma. He was accepted to all except for Stanford. He ultimately decided to attend Harvard College. At the age of 19, Leslie graduated from Harvard with a degree in Government, concentrating in Political Science and Macroeconomics. During the undergraduate Class Day ceremonies, Leslie was selected to be the Harvard Male Orator, one of four seniors who deliver orations to the graduating senior class.

Leslie grew up around music, playing cornet as a child in the Salvation Army band. Ryan later switched to piano because his overbite made it difficult to get proper embouchure on a brass instrument. At Harvard, he joined the Krokodiloes, an a cappella group. Leslie suddenly saw a new future for himself when a friend played him a Stevie Wonder CD freshman year. “I became obsessed with him,” says Leslie. “I wanted to chase that man's career.” Leslie became a constant presence at the on-campus recording studio. Fellow student Chiqui Matthew, now working for Goldman Sachs, remembered Leslie making beats at every free moment: “He was on a different level of intensity. Most of us were pretty realistic — we're Harvard students; this music stuff is fun, but this isn't the future. But Ryan always had a ten-year plan about how he was going to take over the music industry.” While still a college student, Leslie began producing tracks for local Boston artists, and molding his image, which Matthew found unconvincing: “He had this pseudo-sexual, thugged-out Lothario thing. I never really bought it. He seemed more like a music nerd to me".

Leslie was named one of "New York's 50 Hottest Bachelors" in 2009 by PageSix Magazine, published by the New York Post.

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