Arnold Schwarzenegger celebrates birthday by showing off fit physique

Arnold Schwarzenegger flaunted his legendary muscles while marking his 79th birthday.

The “Terminator” star was pictured pumping iron in what appeared to be Los Angeles in a pair of celebratory birthday pics Thursday.

In both snapshots, he wore a black t-shirt and matching shorts, and accessorized with a gold watch and a pair of sunglasses as he displayed his massive arms for his followers.

In the caption, the “Predator” star plugged his Pump Club — a fitness community app that offers customized nutrition tracking, workout routines, and more.

“I turn 79 today. I don’t want any gifts,” he wrote in part. “Instead, my team and I are turning the fitness industry upside down.”

Fans of the former governor of California flocked to the comments thread to gush over his ripped physique, even as he approaches 80.

“Happy birthday, 50 years ago you were training with one of the best physiques ever and 50 years later today you are still training with one of the best physiques ever for your age!” one person remarked, while another enthused, “HBD legend!🔥”

A third chimed in, “Health, happiness and best of life to you 🎂 You’ve inspired an entire generation and still continue to,” while a fourth wrote, “thanks for inspiring me all those years ago to follow my dream! ✨🙏”

Schwarzenegger — whose 28-year-old son, Joseph Baena, is following in his famous dad’s footsteps with a bodybuilding career — again defied age last month, when he stepped out with much-younger girlfriend Heather Milligan.

In a rare public appearance, the couple — who began dating 14 years ago — were spotted at the Austrian World Summit in Vienna, Austria, in June.

In a photo from the event, Milligan, 51, and the “True Lies” actor were joined by former US Vice President Kamala Harris and President Alexander Van der Bellen of Austria.

The “Kindergarten Cop” actor’s fitness-themed birthday upload comes on the heels of decades of fitness accomplishments.

In a 2023 interview, the seven-time Mr. Olympia winner admitted to struggling with body image as he ages — even despite being more fit than the “majority” of people his age.

“I kind of smile because every day I do look in a mirror and I say, ‘Yep, you suck,’” he told Howard Stern at the time.

“When you’ve been hailed for years as this supreme body, and you have the definition and you see the veins coming down your abs, and you see veins on top of your chest and then … you roll the clock 50 years and you’re standing there and you don’t see that anymore,” he lamented.

He added, “I never, ever thought about that when I was 30 years old or 40 years old that this [was] going to happen. It just sucks.”