In 1986, Marwan enrolled at the Université Saint-Esprit de Kaslik (USEK) in Lebanon where he studied piano, Music Harmony and Theory and Music History. During his university years, he won a prize in a music composition contest. The award was presented to the singer by former Lebanese President Amin Gemayel. In 1988, Marwan produced his very first album Kasak Habibi depending solely on himself in writing the lyrics and composing the songs, and of course producing it.Marwan started a new phase in his life in 1989, not as a singer but as a keyboard player and a band conductor. He performed in various varieties TV shows. He continued as a keyboard player until 1996 and played with many famous Lebanese artists. But during that period, Marwan wrote and sang the single, Fik Yamma Balak. It was released in 1994 and established him as a talented singer. In 1997 he wrote, composed and performed his second single Lasbor Ala Welah. It was not until 1999 however that Marwan finally became known in the music industry as a writer/composer. He wrote and composed two hit songs for Nawal Al-Zoughbi; "Tia" and "Dalouna." Then the year 2001 came along and with it Marwan launched his first official album Khayal El-Omer. The very next year, Khoury shot his first video clip "Ya Shog". Throughout his career Marwan has twice been awarded the prestigious Murex D'Or. First in 2003, when the singer got his first recognition as a talented composer. And then in 2004, the year he was awarded one more Murex D'Or for Best Multi Taleneted Artist (singer, composer, music video, song and album).In 2005, Marwan reached his milestone. He landed a five-year contract with the major production company, Rotana Records. He also released his first major album Kil Al Asayed in May. The album and the title song were a big hit and their popularity spread fast. It was this album that actually made Marwan famous in the Arab world. In 2006 Marwan released an additional album "Asr Al Sho'o". As "Kil Al Asayed" it was one of the best selling albums of that year.Marwan Khoury is considered one of the most respected Lebanese / Arab artist. His successful live performances in the most prestigious places like Opera House of Egypt and Carthage Festival of Tunisia is a great witness.