Kourtney Kellar, born on March 8, 1991, in Dallas, Texas, is a model and former Miss Texas International who built her career in the modeling industry before marrying NBA player Isaiah Hartenstein. Their relationship began in 2019 when Hartenstein sent Kellar a direct message complimenting her smile. After a few FaceTime calls, they met in person while he was playing for the Houston Rockets. Kellar graduated from Henderson State University in 2014 and started modeling to support herself during college, eventually winning the Miss Texas International title in 2017. This achievement opened doors to significant modeling opportunities, including appearances at Miami Swim Week and New York Fashion Week. Kellar was previously engaged to country singer Chase Bryant before her relationship with Hartenstein. The couple dated for three years before getting engaged on a Malibu beach in April 2022 and married on July 29, 2023. They welcomed their son, Elijah James, on May 23, 2024, and currently reside in Oklahoma City, where Hartenstein plays for the Thunder.