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

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The life of an NBA star often comes with a spotlight, but for Oklahoma City Thunder center Isaiah Hartenstein, his biggest off-court win has been his marriage to model Kourtney Kellar. As of late December 2025, the couple remains one of the league's most talked-about duos, especially following Hartenstein's pivotal role in the Thunder's stunning 2025 NBA Finals victory. Their relationship, which began with a surprising direct message on social media, has blossomed into a full-fledged partnership, culminating in a beautiful California wedding and a supportive presence throughout his career, from the New York Knicks to his championship run in Oklahoma City.

The curiosity surrounding Isaiah Hartenstein’s wife, Kourtney Kellar Hartenstein, is immense. She is far more than just a supportive spouse; she is an accomplished model, a savvy social media personality, and a proud Texas native who has shared intimate details about their journey together, giving fans a rare glimpse into the private life of the American-German basketball sensation. This article delves into the most current and unique details about the woman who captured the heart of the 7-foot NBA center.

Isaiah Hartenstein: A Quick Biography and Career Snapshot (Updated 2025)

Isaiah Hartenstein, a prominent figure in the National Basketball Association (NBA), has seen his career reach new heights in the most recent season. His journey is a blend of international experience and American basketball pedigree.

  • Full Name: Isaiah Hartenstein
  • Date of Birth: May 5, 1998
  • Place of Birth: Eugene, Oregon, U.S.
  • Nationality: American-German
  • Height/Weight: 7 ft 0 in (2.13 m) / 250 lbs (113 kg)
  • Parents: Florian Hartenstein (father, a former professional basketball player) and Theresa Hartenstein
  • NBA Draft: 2017, 43rd overall pick by the Houston Rockets
  • Current Team (2025): Oklahoma City Thunder (OKC)
  • Previous Teams: Houston Rockets, Denver Nuggets, Cleveland Cavaliers, Los Angeles Clippers, New York Knicks
  • Career Highlight: 2025 NBA Finals Champion with the Oklahoma City Thunder
  • Recent Milestone: Logged a career-high 33 points in November 2025

The center's move to the Oklahoma City Thunder in 2024 via free agency proved to be a career-defining decision, cementing his status as a key rotational player and a champion.

The Unexpected Love Story: How Isaiah Met Kourtney Kellar

The modern era of celebrity romance often involves social media, and Isaiah Hartenstein and Kourtney Kellar’s story is a perfect example of a successful Instagram connection. Their initial interaction was not a chance meeting in a VIP lounge but a direct message that changed both their lives.

1. Kourtney Was the One Who Initiated Contact (The DM Slide)

In a surprising twist for a high-profile athlete, Kourtney Kellar was the one who first reached out to Isaiah Hartenstein. She revealed in interviews that she found his profile and decided to send him a direct message (DM) on Instagram. This bold move led to their first conversation and eventually their first date, proving that sometimes, shooting your shot pays off, both on and off the court.

2. She is an Accomplished Model from Texas

Kourtney Kellar is a professional model with a significant following on social media, boasting hundreds of thousands of followers on Instagram. She is a native of Texas, which she often references in her posts. Her career has seen her work with various brands, giving her a professional identity that stands strong alongside her role as an NBA wife.

3. Their Engagement Happened in a Tropical Paradise

After dating for a period, Isaiah proposed to Kourtney in April 2022. The engagement took place during a romantic trip to the Bahamas, a picturesque setting that the couple shared photos of on their respective social media accounts, sparking excitement among their followers.

Inside the Hartenstein Wedding and Post-Championship Life

The couple's marriage in 2023 was a highlight of the NBA offseason, and Kourtney has been a vocal and supportive presence throughout Isaiah's career transitions, particularly his move to the Oklahoma City Thunder and their subsequent championship success.

4. They Tied the Knot on a Yacht in Newport Beach

Isaiah Hartenstein and Kourtney Kellar officially became husband and wife on July 29, 2023. The intimate ceremony took place on the City Cruises Endless Dreams Yacht in Newport Beach, California. The location offered a "dreamy California wedding" backdrop, which the newlyweds shared details of with various media outlets.

5. Kourtney Kellar Officially Became Kourtney Hartenstein

Following their nuptials, Kourtney adopted her husband's surname, officially becoming Kourtney Hartenstein. She often uses this name in her social media bio and public appearances, signifying her commitment to their marriage and family life.

6. She Has Been Vocal About His Career Transitions

Kourtney has been a highly visible and supportive partner, particularly during Isaiah's move from the New York Knicks to the Oklahoma City Thunder. She posted a heartfelt farewell to New York on Instagram, acknowledging the city and the Knicks organization, before embracing their new life in Oklahoma City. This public support highlights the strong partnership between the couple as they navigate the unpredictable nature of professional sports.

7. Kourtney Revealed Unknown Relationship Details Ahead of the NBA Finals

During the Thunder's 2025 NBA Finals run, Kourtney shared intimate and previously unknown details about their relationship dynamic, emphasizing their strong bond and mutual support. Her public commentary provided a personal touch to the high-stakes environment of the championship, humanizing the players and their families. Her continued presence courtside and on social media has made her one of the most visible and beloved partners in the Thunder organization.

Topical Authority: Kourtney Kellar's Social Media Presence and LSI Entities

Kourtney Kellar Hartenstein’s online presence is a key part of her public persona. She frequently shares behind-the-scenes glimpses of their life, offering content that resonates with fans interested in the intersection of NBA life and modeling. Her posts often feature her husband, their travels, and her work, creating a relatable and engaging brand. Entities like Newport Beach, the City Cruises Endless Dreams Yacht, and the Oklahoma City Thunder are central to their shared narrative.

The couple’s journey—from a simple Instagram DM to a California wedding and an NBA Finals ring—has cemented their status as a modern NBA power couple. Kourtney's background as a Texas model and her candid revelations about their life ensure that the public interest in the Hartensteins remains high.

isaiah hartenstein wife
isaiah hartenstein wife

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