The Los Angeles Lakers have hired a celebrity trainer who’s most known for shaping Kim Kardashian’s internet-breaking ass.

On Wednesday, officials announced Gunnar Peterson will be the team’s new director of strength and endurance training. The news comes just weeks after the previous director, Tim DiFrancesco, stepped down.

Peterson, commonly known as the "ass guru," has worked with some of the biggest names in Hollywood, including several members of the Kardashian klan, Jennifer Lopez, Angelina Jolie, Matthew McConaughey, and The Rock. He’s also trained some of the world’s best athletes in the NBA, NHL, NFL, MLB, and various NCAA sports.

"From his time in college at Duke University until now, Gunnar has pursued excellence in training and fitness," General Manager Rob Pelinka said in a press release. "Gunnar is a true pioneer and visionary at his craft, and will bring a new mentality to our weight room which we are all very excited about. Since Magic [Johnson] and I have worked with Gunnar in the past, we have a strong relationship with him, which makes working together now feel seamless."

Peterson is a graduate of Duke University and has been in the fitness industry for nearly three decades. According to a blog post on his official website, he uses a naked photo of Mrs. West as motivation to continue his work: "Oiled and toned, the framed snap shows Kim at her pneumatic best and is accompanied by a handwritten note of thanks to Gunnar for her 'best body yet.'"