FattMack Biography: Age, Net Worth, Real Name, Girlfriend, Songs, Albums, Instagram
McKenzie Haynes, professionally known as FattMack, is an American rapper and songwriter who rose to prominence through his raw lyricism, melodic delivery, and emotionally reflective Southern rap style.
He gained wider recognition after building a prolific independent catalog that included projects such as Rookie of the Year, Mr. Did It by Hisself, and Untreated Trauma, before signing with Great Day Records and Santa Anna.
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His music has since carried him from Mobile’s local rap scene into a growing national audience, with collaborations involving artists such as G Herbo and Polo G further expanding his profile.
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| Wiki Facts & About Data | |
| Real Name: | McKenzie Haynes |
| Stage Name: | FattMack |
| Born: | March 24, 2005 (age 21 years old) |
| Place of Birth: | Mobile, Alabama, United States |
| Nationality: | American |
| Ethnicity: | African American |
| Religion: | Christianity |
| Parents: | Mr. and Mrs. Haynes |
| Siblings: | Two brothers |
| Relationship: | Dating |
| Children: | Remi Aurora |
| Occupation: | Rapper, Songwriter |
| Net Worth: | $500,000 |
Early Life and Education
McKenzie Haynes was born on March 24, 2005, in Mobile, Alabama, and is at 21 years old. He grew up in Mobile and spent much of his childhood focused on football, playing competitively until the eighth grade.
During his teenage years, his attention gradually shifted toward music, with rap becoming an outlet that allowed him to express himself and stay away from trouble.
Music was already part of his life from an early age. Haynes performed solos in his church choir when he was five years old, although his serious pursuit of rap came later. While in high school, he began writing and recording his own material and eventually adopted the name FattMack.
Personal Life
FattMack is deeply committed to his long-term girlfriend, Keyley, whom he met shortly after his high school graduation while she was completing her senior year. Their romance began with a simple message on Instagram and has blossomed into a strong, supportive partnership that withstands the pressures of his rising music career.
FattMack openly prioritizes his relationship, stating that staying faithful is easy because he treats his interactions with fans and colleagues strictly as professional business. The couple recently reached a major milestone together in late 2025, welcoming their newborn daughter, Remi Aurora.
Career
FattMack began his commercial recording career in 2020 with the release of his debut project, Rookie of the Year. He followed it with The Villain in 2021 before entering one of the most productive periods of his career in 2023, releasing Mr. Did It by Hisself, SkinnyMack, and Fatt. His steady output helped establish him as one of the emerging young rappers from Mobile, Alabama.
His momentum continued in 2024 with Mr. Did It by Hisself 2 and Money Music Murder. He subsequently signed with Great Day Records and Santa Anna, releasing TMK as his label debut. In 2025, he followed with Here to Stay and Untreated Trauma, with the latter featuring a collaboration with Chicago rapper G Herbo. His full-length McKenzie arrived later that year and was expanded into McKenzie 2.0 in February 2026.
FattMack continued releasing music throughout 2026, including the Polo G collaboration Lay It Down and other singles. His McKenzie 2.0 project contained 28 tracks in its Apple Music edition and was released through Great Day Records and Santa Anna on February 27, 2026. By August 2026, he had also released Mr. Did It By Hisself 3, demonstrating the pace at which he has continued building his catalog.
Net Worth
FattMack has an estimated net worth of $500,000. His income is primarily connected to music streaming, digital sales, recording agreements, performances, and other activities surrounding his growing career as a recording artist.
Social Media
- Instagram: @fattmack_
- YouTube: @FattMack
Discography
- Rookie of the Year (2020)
- The Villain (2021)
- Mr. Did It by Hisself (2023)
- SkinnyMack (2023)
- Fatt (2023)
- Mr. Did It by Hisself 2 (2024)
- Money Music Murder (2024)
- TMK (2024)
- Here to Stay (2025)
- Untreated Trauma (2025)
- McKenzie (2025)
- McKenzie 2.0 (2026)
- Mr. Did It By Hisself 3 (2026)
What People Ask
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