How to get shapely glutes like Christopher Meloni, according to a celebrity trainer

• Christopher Meloni, star of Law and Order: Organized Crime, was spotted on set showing off his strong butt.
• The actor, now 60, is known for having "the best butt in prime time."
• If you covet a shapely tush, work on posterior chain exercises like kettlebell swings and squats.

The internet is once again thirsty for actor Christopher Meloni.

This time, he was spotted flexing an impressive set of glutes while filming in Park Slope, Brooklyn.

A Twitter user posted a photo after passing the set of Law and Order: Organized Crime, and saw Meloni in his starring role as Detective Elliot Stabler.

People reacted, lusting after the man himself and coveting a similarly shaped backside.

With more and more people hitting the gym in order to look their best for hot vax summer, Meloni's assets were the subject of not just awe but envy, too.

Meloni's muscular tush was not created overnight - the actor was crowned "The Best Butt in Prime Time" in 2014.

To maintain a muscular physique, he uses a squat rack and plenty of weight at a gym, per his Instagram account. His recent post showed him doing presses, but he clearly doesn't skip leg day.

Meloni, who recently turned 60, shows no signs of slowing down - much to the delight of fans - and joined in on the fun on Twitter.

How to get a more defined derriere

For those trying to catch up on getting a shapely butt, it can take time.

You can build a bigger, stronger butt with exercises that target the posterior chain, including the hamstrings, glutes, and back, celebrity trainer Gunnar Peterson previously told Insider.

Kettlebell swings, glute bridges, and weighted squats can all help sculpt your butt, said Peterson, whose clients have included Jennifer Lopez, the Kardashians, and Dwayne "The Rock" Johnson.

• To perform a kettlebell swing, start with the weight on the ground between your feet and hinge at the hips to bend down and grab it. Keep tension in your core, back, and arms, but don't pull. Using the force of your legs, swing the weight explosively forward and up to approximately eye level, squeezing your butt at the top. Let it swing back between your legs as you return to your original position and repeat.
• To perform a glute bridge, lie on your back with knees bent and feet on the ground about six inches from your butt. Press your upper back and heels into the ground to lift your butt off the ground, keeping your hips square and a straight line from your knees to your shoulders. Lower and repeat.
• To perform a weighted squat, you can hold the weight either directly in front of your chest (goblet squat), or resting on the front or back of your shoulders. With feet hip width apart and parallel to each other, bend your knees, keeping your core tight and chest upright. As you lower your body, focusing on pushing your hips back and your knees out, until your knees reach an angle of 90 degress or less. Stand and repeat.

Building muscles anywhere on your body also takes energy, so you need to eat to fuel your gains, according to experts.

"You need a calorie surplus," Peterson said. "Make sure you're getting enough protein, quality carbs, and healthy fats."

The exact amount of extra calories you'll need can vary, but research suggests that a good place to start is around 300 to 500 calories more than what you'd typically need to get through your day.