In 2005 Miller along with his father Master P founded a new record label titeld Guttar Music Entertainment.Also in 2005 Miller along with his brother Valentino Miller who was known as Young V at that time and their three cousins C-Los, Lil' D & Willie J would form the rap group Rich Boyz & on November 22, 2005 they would release their debut album titled Young Ballers: The Hood Been Good to Us via Guttar Music. On April 4, 2006, Miller released his debut digital album Lottery via Guttar Music, Urban Digital & Go Digital Music Group, it was Miller's first album released with his official name changed to Romeo.

Miller then signed to his father's relaunch label New No Limit Records.

In 2002, Miller released his second album titled Game Time; it charted the US Billboard 200 at number thirty-three.

In 2008, Miller stated he was working on his fourth studio album titled Gumbo Station.

On March 3, 2009, Miller released a compilation album titled Get Low LP that contained singles that were originally supposed to had been on Gumbo Station & also contained original songs from his previous albums it would sale over 20,000 copies.

After letting his followers sweat a little bit (especially his predominant female fan base), the artist formally known as Lil let it be known that Toneata was all his.“You shined like a diamond at the #misscaliforniausa pageant my love @toneatam,” he gushed on Instagram. ”Although we’re currently in 2015, swirly and biracial relationships still make people lose their minds on occasion.

Madame Noire did some investigating in Miller’s comments and found some pretty unruly reactions to the Toneata Morgan courtship. My apologies, I’m just over all of our black men choosing to be with white women as if black women carry the plague or something.

Miller is the son of well known rap mogul Master P.

Miller has founded record label's Guttar Music, Take A Stand, The Next Generation & his current label No Limit Forever.

In 2006, Miller released the soundtrack to his movie God's Gift; it was Miller's first album to be explicit.