Kendall Jenner
Kendall Jenner cheered on Blake Griffin during the Clippers' game against the Memphis Grizzlies. Pictured: Jenner adjusts her hair on stage at Westfield Parramatta on Nov. 17, 2015 in Sydney. Getty Images/Lisa Maree Williams

Kendall Jenner is Blake Griffin's cheerleader.

On Saturday, the "Keeping Up with the Kardashians" star was spotted courtside at the Clippers versus Memphis Grizzlies game, cheering on her boyfriend, Us Weekly reported. Jenner sported a white turtleneck, jeans and a pair of thigh-high boots. Jenner was first spotted wearing the footwear, which reportedly costs $10,000, on her 22nd birthday.

During the game, Jenner was reportedly all smiles as she rooted for Griffin and his team. Unfortunately, Clippers lost to the Memphis Grizzlies 113 to 140, despite Griffin's 30 points.

This was not the first time that Jenner has been spotted at one of Griffin's games. On Oct. 19, Jenner also witnessed a Clippers game at the Staples Center. "They're legit. They're a full-on couple," a source told Us Weekly of the couple's relationship. "Kendall has been going to a lot of his games and they have been enjoying time at home when Blake is in town. They're good."

On Thursday, Jenner turned 22 years old. The supermodel celebrated her birthday at Petite Taqueria in West Hollywood. She wore a white cropped top, ripped jeans and crystal boots from designer fashion house Saint Laurent.

Among her party guests were Kim Kardashian, Kanye West, Kourtney Kardashian, Younes Bendjima and Caitlyn Jenner. Also present were her pals and family friends Hailey Baldwin, Sophia Hutchines, Faye Resnick and Kyle Richards. Of course, Griffin did not miss his girlfriend's special day. For the occasion, the NBA player wore a black shirt and unbuttoned checkered long-sleeve shirt. He paired it with a pair of ripped jeans to match his lady love's attire.

Jenner and Griffin were first linked to each other in August when they were spotted going on a double date with Baldwin and Chandler Parsons. According to an eyewitness, the foursome's outing was "definitely more than just a friendly outing because the girls were seated close to their men."

However, the insider added that Jenner and Griffin did not seem openly affectionate to each other during the date. The only PDA they showed was a brief moment when Griffin wrapped his arms around the reality star's shoulders.

In related news, a source confirmed that Griffin broke up with his ex-fiancée, Brynn Cameron, in July. "They ended things on good terms and they are still friends while raising their son and daughter," the source added.