Young Thug’s Fiancée: 5 Shocking Details About Mariah The Scientist And Their High-Profile Engagement

The question of "Who is Young Thug's girlfriend?" has finally been answered with a definitive, headline-making update: he is engaged to the contemporary R&B singer, Mariah the Scientist. This news, which has captivated the hip-hop world, confirms that their relationship is stronger than ever, especially against the backdrop of one of the most high-profile legal sagas in music history. As of today, December 18, 2025, the couple's bond has been solidified by a surprise on-stage proposal, marking a new chapter for Jeffery Lamar Williams and his partner.

The Atlanta rapper's dating life has always been a subject of intense public and media scrutiny, but his connection with Mariah the Scientist, whose real name is Mariah Amani Buckles, has proven to be his most enduring and publicly supported relationship yet. Their journey has been unconventional, navigating the pressures of fame, music collaboration, and a lengthy legal battle, all of which have only seemed to deepen their commitment to one another.

Young Thug: Complete Biography Profile

Young Thug, a figure known for his genre-bending music, distinctive vocal style, and unique fashion sense, has consistently been a polarizing and influential force in modern hip-hop. His personal life, particularly his romantic relationships, has often mirrored the complexity of his career.

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• Full Name: Jeffery Lamar Williams
• Date of Birth: August 16, 1991
• Place of Birth: Atlanta, Georgia, U.S.
• Age: 34 (as of December 2025)
• Profession: Rapper, Singer, Songwriter, Record Executive (CEO of Young Stoner Life Records - YSL)
• Notable Albums: So Much Fun (2019), Punk (2021), Business Is Business (2023)
• Career Highlights: Known for pioneering the trap music subgenre, winning a Grammy Award for his work on Childish Gambino's "This Is America," and his influential collaborations across various genres.
• Previous Notable Relationship: Engaged to fashion designer Jerrika Karlae from 2015 to 2020.
• Children: Young Thug is the father of six children with multiple mothers.
• Legal Status: Currently facing charges in the YSL RICO trial (Racketeer Influenced and Corrupt Organizations Act) in Fulton County, Georgia.

The Current Girlfriend Who Became His Fiancée: Mariah the Scientist

The most significant update in Young Thug's romantic life is his engagement to singer and songwriter Mariah the Scientist. This relationship has evolved under the intense spotlight of the public eye, blossoming from a creative partnership into a full-fledged commitment.

1. The Surprise On-Stage Proposal

The news broke in December 2023 when Young Thug proposed to Mariah the Scientist during his concert at State Farm Arena in Atlanta. The highly public, emotional moment quickly went viral, confirming that Mariah was not just his girlfriend, but his future wife. The proposal was a powerful statement of commitment, especially given the ongoing legal challenges facing the rapper.

2. Mariah’s Background: From Biology Student to R&B Star

Mariah the Scientist, born Mariah Amani Buckles, is a distinctive voice in the contemporary R&B scene. Her stage name is a nod to her past: she was a biology student at St. John's University before dropping out to fully pursue her music career. This unique background and her smooth, introspective musical style have set her apart, establishing her as a respected artist in her own right. Her albums, like Master and Ry Ry World, showcase her talent and have drawn a dedicated following.

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3. The Relationship Timeline: How They Connected

The couple's romantic relationship is believed to have started around late 2021, following a period of professional collaboration. They were first seen together at an NBA game, sparking initial rumors of a new romance. Mariah has clarified that their connection began after she wished him a happy birthday online, which he initially missed but later replied to, leading to a conversation and their eventual first meeting.

Their bond was initially strengthened by mutual respect for each other's artistry. They have collaborated musically, further intertwining their personal and professional lives. Despite the relatively short duration of their public relationship before the engagement, their commitment is evident.

Unwavering Support Amidst the YSL RICO Trial

Perhaps the most compelling aspect of Young Thug and Mariah the Scientist's relationship is the unwavering support she has shown him throughout the challenging YSL RICO trial. Her actions have demonstrated a profound commitment that transcends the typical celebrity romance.

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4. Public Displays of Loyalty in Court

Mariah the Scientist has been a consistent presence in the courtroom, often attending the lengthy proceedings to show her support for Jeffery Lamar Williams. This act of loyalty has been widely reported and praised by fans, highlighting her dedication during a period when many relationships might falter under the immense pressure.

In one notable instance, she was photographed wearing an Yves Saint Laurent shirt, a clear and public gesture of support for Young Thug’s record label, Young Stoner Life (YSL), which shares the same acronym. These small but powerful acts have made her a symbol of resilience and devotion in the face of a high-stakes legal battle.

5. The Relationship's Test: Longer Incarcerated Than Dating

Mariah the Scientist has publicly acknowledged the difficulty of their situation, revealing that Young Thug has been incarcerated for a period longer than they were officially in a relationship. This candid admission underscores the depth of their commitment. She has spoken about their decision to stay together and weather the storm, emphasizing that their connection is not superficial but built on a deep, personal bond that has been tested by the circumstances of the RICO case.

The engagement, therefore, is seen by many as a powerful declaration that their love is not contingent on his freedom or public perception, but is a promise for a future they intend to share once his legal battles are resolved.

Young Thug's Past Relationships and Family Life

Before his engagement to Mariah the Scientist, Young Thug's most public and long-term relationship was with fashion designer Jerrika Karlae.

The Jerrika Karlae Era

Young Thug and Jerrika Karlae began dating in 2013 and were engaged for several years, from 2015 to 2020. Their relationship was highly publicized and often tumultuous, featuring on-again, off-again periods that were frequently documented on social media. Karlae was deeply involved in the YSL world and was a prominent figure in the rapper's life for nearly a decade. The eventual end of their engagement paved the way for Young Thug's later relationship with Mariah the Scientist.

Father to Six Children

Young Thug is also a father to six children, a fact that is central to his personal life, though he generally keeps their identities and the details of his co-parenting relationships private. The mothers of his children are not all publicly known, but the rapper has occasionally spoken about his desire to be an active father.

Tragically, one of the mothers of his children, LaKevia Jackson, was shot and killed in a dispute in 2022. This event brought a difficult personal tragedy into the rapper's life, further underscoring the complexities and challenges he has faced outside of his music career.

The journey of Young Thug and Mariah the Scientist is a testament to commitment in the face of adversity. Their engagement, confirmed by the on-stage proposal, provides a fresh and compelling narrative to the ongoing story of Jeffery Lamar Williams, proving that even under the most intense scrutiny, a strong, supportive, and enduring connection can be formed.