[5][6] On March 11, 2011, Miller performed live for the first time ever, opening for Snoop Dogg at Club Cinema in Pompano Beach, Florida.

[9] As a grand prize winner, Miller was awarded $35,000 to use for his music career as well as a video with YouTube celebrity Keenan Cahill.

[citation needed] Afterward he opened for Mac Miller and performed alongside Flo Rida, Sean Kingston, and Asher Roth at the "Think Pink Rocks" concert which benefited breast cancer awareness.

[16][17] On November 4, 2014, Miller released the EP, initially titled Lion Heart, then renamed to Dazed and Confused, due this song being more successful on the charts.

The EP includes the songs "Party in the Penthouse", "Lion Heart", along with the lead single, and features with Nikki Flores on "Ghost" and Travie McCoy on "Dazed and Confused".

[22] The 2015 EP Rumors closes with the track "Sunshine" about Miller's childhood friend Dylan Andrew Schopp who had died by suicide in February 2015 at age 21.

[2][5] In December 2016 he was chosen as Elvis Duran's "Artist of the Month", and he performed "Overnight" live on NBC's Today show with Kathie Lee and Hoda Kotb.

[27] Miller later said that Warner Bros. Records had told him to stop rapping, limited his projects to seven tracks, and that he had felt rushed during studio time.

[29][34][35] On August 2, 2018, Miller was the celebrity guest at the color war breakout at Camp Chen-A-Wanda located in Thompson, Pennsylvania.

On November 16, 2018, Miller released his first major single in five years, "Wait for You", which played on radio stations across the United States.

[29] The Wait For You Tour began on April 11, 2019 in Las Vegas and ended on May 17, 2019, in Los Angeles at the El Rey Theatre.

[36] After the success of the first video, Miller and his family continued to record songs, which they called "Quarantunes", a play on the word "quarantine".

[44][45] Franklin Jonas opened for Miller at the House of Blues in San Diego on October 15, 2023, the final night of his tour.

In July 2023, Miller embarked on a tour in China, visiting Shanghai, Beijing, Guangzhou, Guiyang, Chifeng, and Yantai.

[47][48] On January 26, 2024, videogame company miHoYo released the music video "White Night" to promote a new update to their game Honkai: Star Rail.

In a September 2024 interview with Zach Sang, Miller discussed his success in China and his plans to continue growing his audience there in the future.

[4] A TikTok video of his dad suprising the couple at their reception by performing a parody of the song "Brandy (You're a Fine Girl)" by Looking Glass received more than two million views.