In 2002, Nickelodeon offered Miller his own show titled Romeo!
Miller gained fame in the early 2000s after signing with No Limit Records, his father's label at the time, with the help of his debut single "My Baby" which went on to be certified platinum by the Recording Industry Association of America (RIAA).
In 2001 Miller released his debut album Lil 'Romeo, which charted the US Billboard 200 at number six and went on to be certified gold, selling over 500,000 copies.
Romeoland charted at #70 on the Billboard 200 and at #29 on the Top Rap Albums chart.
In 2005 Miller along with his father Master P founded a new record label titeld Guttar Music Entertainment.
In the later 2000s, as No Limit Records popularity was slowly declining, so was Miller's.