Moga spent his early years in a family with many interests related to music: a great-grandfather wrote for a traditional music ensemble, while his grandfather knew banjo and his grandmother sang in a church choir. His father taught guitar, and his mother was a canto teacher. Marius has a brother, Julian, who is a video director.
During high school, Moga composed for Talk to Me, the band he had with Daniel Comaniciu a song entitled "Night." It is his first success, which places him at the forefront of the music scene of Alba-Iulia. Along with Dan Comaniciu makes the first album released in Zoom Studio Valcea . In 2000, he will be invited to Bucharest by Adrian Sina, member of the group Akcent, for which he composes the song “ Ti-am promis” ,ranked highly in the charts.