7 Shocking Facts About Kourtney Kellar: The Model Who Married NBA Champion Isaiah Hartenstein

The life of an NBA champion is often as captivating off the court as it is on it, and for Oklahoma City Thunder star Isaiah Hartenstein, his world is anchored by his wife, Kourtney Kellar Hartenstein. As one of the newest and most prominent figures among the NBA WAGs, Kourtney has carved out a successful career as a model and social media personality, bringing a vibrant energy to the Hartenstein family's new chapter in Oklahoma City. This article, updated for the current season, dives deep into her background, their whirlwind romance, and the latest family developments, including their son's birth and Isaiah's massive contract with the Thunder.

This comprehensive look reveals the journey of Kourtney Kellar Hartenstein, from her roots in Dallas, Texas, to becoming the wife of a pivotal NBA center. The couple's story is a modern-day fairytale, beginning with a simple Instagram direct message and culminating in a 2025 NBA Championship celebration. With Isaiah Hartenstein solidifying his role as a key contributor to the Oklahoma City Thunder, the spotlight on Kourtney has never been brighter, revealing a woman of drive, ambition, and unwavering support for her husband.

Kourtney Kellar Hartenstein: Full Biography and Profile

Kourtney Kellar Hartenstein is a prominent American model, social media influencer, and former ring girl who gained widespread recognition following her marriage to NBA star Isaiah Hartenstein. Her career spans professional modeling, brand partnerships, and public appearances, making her a notable figure in her own right.

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• Full Name: Kourtney Kellar Hartenstein
• Date of Birth: Information is kept private, but she was born in the 1990s.
• Place of Birth: Dallas, Texas, United States.
• Nationality: American.
• Parents: She comes from a military family, a detail she has occasionally shared.
• Education: Attended college where she was a cheerleader and a gymnastics coach. She initially pursued modeling to help finance her education.
• Profession: Professional Model, Social Media Influencer, Former Ring Girl.
• Marital Status: Married (to Isaiah Hartenstein).
• Wedding Date: July 2023.
• Husband: Isaiah Hartenstein (NBA Center for the Oklahoma City Thunder).
• Children: One son, Elijah James Hartenstein.
• Son's Birth Date: May 23, 2024.
• Social Media Presence: Kourtney maintains a significant following, with hundreds of thousands of followers on Instagram, where she shares lifestyle, fashion, and family content.
• Key Career Highlights: Featured model in various campaigns, notable ring girl appearances, and successful brand collaborations.

The Modern Romance: How a Simple DM Led to an NBA Marriage

The love story of Isaiah Hartenstein and Kourtney Kellar is a perfect example of modern romance in the digital age, proving that even a simple direct message (DM) can lead to a lifetime commitment.

The Instagram Slide: A 2019 Beginning

Their relationship officially began in 2019 when Isaiah Hartenstein, then a younger player in the NBA, took a chance and messaged Kourtney on Instagram. In a move that is now a famous anecdote in their relationship history, Hartenstein slid into her DMs with a compliment about her smile. At the time, Kourtney was living in Dallas, Texas, and was focused on her modeling career. The initial digital exchange quickly blossomed into a deeper connection, leading them to start dating officially.

The Engagement and July 2023 Wedding

After dating for three years, the couple got engaged. Following the proposal, they moved to Westchester, New York, during Isaiah's tenure with the New York Knicks. The couple exchanged vows and officially married in a beautiful ceremony in July 2023. The wedding marked a significant milestone, cementing their partnership just as Isaiah was entering a pivotal stage of his NBA career.

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Welcoming Elijah James Hartenstein

In January 2024, Kourtney announced her pregnancy, sharing the joyous news with her followers. The couple welcomed their first child, a son named Elijah James Hartenstein, on May 23, 2024, slightly ahead of the expected due date. The birth of Elijah James Hartenstein added a new, beautiful dimension to their family life, with Isaiah often seen proudly holding his son during team celebrations, including the 2025 NBA Finals trophy presentation.

Kourtney Kellar's Career Beyond the NBA Sidelines

While Kourtney Kellar Hartenstein is widely known as the wife of an NBA champion, her professional life is noteworthy and extends far beyond the basketball court. She is a driven entrepreneur and a successful personality in the modeling and entertainment industries.

From Dallas Model to Social Media Star

Born and raised in Dallas, Kourtney began her modeling career as a practical means to an end: to finance her college education. Her early career was marked by her time as a college cheerleader and a gymnastics coach, which highlights her athletic background and discipline. This early foundation of hard work propelled her into the competitive world of professional modeling, where she has secured numerous campaigns and partnerships.

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The Jaw-Dropping Ring Girl Debut

One of Kourtney's most talked-about recent ventures was her debut as a featured ring girl at a high-profile boxing event. This move generated significant buzz, showcasing her versatility and willingness to step into different facets of the entertainment world. Her "jaw-dropping" appearance made headlines and further solidified her status as a dynamic figure in the public eye, separate from her husband's NBA fame.

A New Chapter with the Oklahoma City Thunder

Following Isaiah Hartenstein's triumphant 2025 NBA Finals victory and his subsequent signing of a major three-year, $87 million contract with the Oklahoma City Thunder, the family embarked on a new life chapter. Kourtney has been a visible and vocal supporter of her husband's move, adapting to the transition from the New York Knicks to the OKC Thunder. Her presence at games and her interactions with other NBA WAGs, such as the wife of former teammate Julius Randle, Kendra Randle, demonstrate her integration into the league's close-knit community.

The Hartenstein Family's Future and Public Life

The Hartenstein family is currently enjoying the peak of Isaiah's career, marked by his success with the Oklahoma City Thunder and their growing family. Kourtney's role as a supportive wife, mother to Elijah James, and a successful professional continues to define their public image.

Life in the NBA Spotlight

Navigating life in the NBA spotlight comes with unique challenges, but Kourtney and Isaiah appear to handle it with grace and transparency. Kourtney frequently uses her large social media platform to share glimpses of their life—from family moments with Elijah to her own professional endeavors—providing fans with a curated but authentic look at their world. This balance between privacy and public sharing has endeared her to many followers and helped to build her personal brand.

Focus on Family and New Beginnings

The birth of Elijah James Hartenstein has shifted their focus, with both parents prioritizing their new role. Isaiah's commitment to the Oklahoma City Thunder and his major contract extension ensure stability for the family's immediate future. Their journey from a simple DM to a family of three, celebrating an NBA championship, is a testament to their strong partnership and shared commitment to building a life together, all while managing two demanding, high-profile careers in sports and entertainment.