Nick Jonas' Shows Off His Super Buff Man Arms -- See the Unbelievable Pic!

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Nick Jonas is sure not skipping days at the gym. In fact, he's doubling up!

The Kingdom star showed off his hulking arms in preparation for the show's third season on Instagram on Thursday, writing, "Gettin it today... Two a days in prep for Kingdom season 3."

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The 24-year-old singer opened up about how he got so ripped in a recent Men's Fitness interview, explaining, "The way I work out is really placing trust in the people around me. I've got a couple good trainers that keep all of my workouts in order."

It seems like those muscles would take a village!

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Jonas also pointed out that he maintains a healthy diet to keep his body feeling right.

"When I’m on the road, I always make healthy choices," he noted. "I don’t have a meal plan delivered to me, but I know what not to eat. I’m always cautious about the food I put in my body."

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"You just feel better when you put nutrition into your daily life," he continued. "It's a whole process."

Meanwhile, Nick's brother Joe Jonas recently opened up to ET about upping his own workout regimen.

Watch the video below.