In 2007, Miller was offered and accepted a scholarship to play basketball for the USC Trojans, at the University of Southern California.

Miller starred in the feature films Jumping the Broom (2011) and Tyler Perry's Madea's Witness Protection (2012).

Romeo was signed to No Limit's subsidiary label Soulja Music Entertainment at the age of five, after he wrote a rap to his father.

They released their debut album titled Young Ballers: The Hood Been Good to Us via Guttar Music on November 22, 2005.

On September 4, 2007, they would release their debut album titled Hip Hop History via Take A Stand Records, UrbanDigital and GoDigital Music Group.

On January 19, 2010, Miller released a promotional single for the album titled "Tell Me a Million Times" featuring Tempo.

[9] On January 26, Miller released a second promotional single for the album titled "Ice Cream Man Jr." which was a tribute to his father.

[11] On March 2, Miller released two EPs to promote the album which were the Famous Girl and Monster/Practice via his label The Next Generation Entertainment and LPD Music.

[21] On May 3, 2011, Miller released the first official single from Intelligent Hoodlum called "Famous Girl (Remix)" which was the mastered version of the original, it still featured the original appearances from Sean Kingston and Miller's cousin Black Don, but it would be later dubbed as a promotional single.

[26][27] On April 12, 2012, Miller released his first single from his upcoming fourth album titled "Hug Me Forever", which featured his brother Valentino.

[31] On January 5, 2015, Miller released his first collaboration mixtape titled We All We Got with his group Money Mafia that includes himself, his father, Ace B, Young Junne, Eastwood, Gangsta, Play Beezy, Calliope Popeye, Flight Boy and No Limit Forever in-house producer Blaq N Mild.

[36][37][38] On July 29, 2015, Miller would release two new singles from his upcoming fourth studio album titled "Till the Club Close" featuring fellow No Limit Forever artist Ace B and "Bent" featuring fellow No Limit Forever artists Ace B and Silkk the Shocker.

[43][44][45][46] On January 7, 2016, Miller would release Fighting Monsters as a mixtape; it would feature guest appearances from Ace B, BlaqNmilD, DeCarlo, Eastwood, €$¢Ø, JSlugg500, his father Master P, Silkk the Shocker, and Travis Kr8ts.

Fighting Monsters was originally supposed to be his fourth studio album, but Miller decided again it would be best to just release it as a mixtape for his fans.

[47][48][49] On November 1, 2016, Miller released two singles from his planned fourth studio album titled "B, All, In" featuring fellow No Limit Forever artist Young Vee, and "Shoulder" featuring DeCarlo and fellow No Limit Forever artist Ace B.

[54] In 2003, he co-starred with Jessica Alba, Mekhi Phifer, and Zachary Isaiah Williams in the dance film Honey.

Miller also made a cameo appearance in Ned's Declassified School Survival Guide as a rapping coach.

He guest-starred as a rapper accused of murder in the 2010 CBS series The Defenders and acted in Jumping the Broom, released in May 2011.

He played as Jake, a young man who is trying to get his money back from a ponzi scheme for his father's church and his retirement.

[58] He was a special guest star on the Nick News with Linda Ellerbee episode If Only I Were An Only Child: The Top 10 Annoying Things My Siblings Do which aired on Nickelodeon on May 13, 2013, on which Romeo (among others) talked about annoying things his siblings did, one of which was his brother taking shoes that Romeo was planning to wear, so he could show them to a girl he liked.

The brand has been promoted by Miller, his group the College Boyys, and also artists such as Justin Bieber, Big Time Rush, and Jaden Smith.

[62] Romeo stated: When I was a kid, I used to lick markers on my t-shirt "I'm going to college" and that imprint stuck in my head and made a difference to me in my life, turning it into a reality.

They can look in the mirror at themselves with a positive goal in mind for their bright future knowing that going to college can make a big difference in their lives.

Surrounded by future NBA players such as O. J. Mayo, Derrick Rose, and Kevin Love, Miller averaged less than 2 points a game and struggled throughout the camp.

"[68] Despite this, on April 13, 2007, Miller verbally committed to the University of Southern California (USC) and signed a letter of intent on November 19.

According to The Wall Street Journal, the decision to grant Miller a full scholarship at USC was largely driven by his relationship with friend and teammate DeMar DeRozan, an All-American forward who was rated as the number five prospect in the country on Scout.com, and his father's influence.