Chris Hemsworth posted a photo of his enormous arms - but people are just commenting on his skinny legs

• Chris Hemsworth posted a photo on Instagram showing his huge arms.
• But the comments filled up with people talking about his skinny legs.
• Hemsworth's brother Luke joined in, writing: "Bro?! You've been skipping leg days again?!"

Chris Hemsworth's latest Instagram post shows off the actor's huge arms, but all anyone is talking about is his skinny legs.

In the photo, the "Thor" star is holding hands with one of his twin sons. "Holding my little man's hand and asking him the age old question. 'What do you want to be when you grow up.' 'Dad i wanna be Superman,'" he wrote. "Lucky I have two other kids."

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Despite the cute caption and Hemsworth's jacked arms, the comments filled up with remarks about Hemsworth's comparatively small legs.

"Bro?! You've been skipping leg days again?!" Hemsworth's brother Luke wrote. The comment had been liked nearly 70,000 times as of Wednesday, and many people echoed the sentiment.

Celebrity friends including Gal Gadot, Ryan Reynolds, and Josh Brolin also commented, expressing their amusement.

In a recent interview with The Telegraph, Hemsworth said his training did indeed focus on his upper body because it's "what you see the most."

"Working with my trainer, we consider the costume and if it shows a lot of shoulder, or are we gonna see the bicep or the traps," he said. "But you want it to be balanced, because there's probably a shirt-off scene somewhere. You don't want to look like Popeye with one section of the body blown up."

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Hemsworth, 37, has been training hard in recent months while filming "Thor: Love and Thunder." He's also preparing to play Hulk Hogan in a wrestling biopic.

The actor's muscle gains have proved challenging for his body double, though - earlier this year, Bobby Holland Hanton said he wished Hemsworth would stop getting jacked.

"Everyone's like, 'Wow, look at the size of him,' and I'm like, 'Yeah, it's brilliant, now I have to put on that size too,'" Hanton told a radio show. "I text him and I'm like, 'Thanks very much, dude, it's going to be even harder this time.'"