Chris Hemsworth has been trolled by his brother after sharing a picture of his legs on Instagram.

After the actor, 37, shared a snap of himself holding his son's hand on Monday, May 24, his brother Luke took aim at the relatively small size of his legs compared to his arms.

Implying that the actor had been neglecting the lower part of his body while working out, Luke wrote: "Bro?! You've been skipping leg days again?!"

[[instagramwidget||https://www.instagram.com/p/CPRq08cpJ3L/]]

Clearly, people agreed with the sentiment, and at the time of writing, the comment has been liked over 42K times.

An Instagram comment. [[imagecaption|| Credit: Instagram / hemsworthluke]]

He wasn't finished trolling there and went on to bring his brother's personal trainer into it, Luke Zocchi, tagging him in another comment, and asking whether he was looking at his legs or his brother's.

An Instagram comment. [[imagecaption|| Credit: Instagram / hemsworthluke]]

Chris has had to get into tip-top physical conditions after filming for Thor: Love and Thunder began earlier this year in Sydney, per Daily Mail.

This comes after his character swapped his muscles for a beer belly in the last installment of the Avengers' Infinity Saga.

In the picture, he can be seen holding the hand of a young boy in a red superhero cape, revealing in the caption that when he asked his son what he wanted to be when he grew up, he said, "Dad i wanna be Superman [sic]."

Hemsworth is best known for his role as Thor, which is why he wasn't exactly happy about his son's answer.

He showed his disapproval with a side glance in the picture and joked that he was "lucky" to have two other children since his son isn't the biggest Thor fan in the world.

Chris Hemsworth. [[imagecaption|| Credit: Alamy / Barry King]]

Reacting to the news that Hemsworth's son isn't Thor's number one fan, surfer Yadin Nicol wrote: "Whack him with ya [hammer] and then see what he says."

An Instagram comment. [[imagecaption|| Credit: Instagram / yadin_nicol]]

Torre Washington added: "yo I like superman too."

An Instagram comment. [[imagecaption|| Credit: Instagram / torre.washington]]

A third added insult to injury writing: "Probably because Superman doesn't skip Leg Day."

An Instagram comment. [[imagecaption|| Credit: Instagram / ruckingnuts]]

Hemsworth's failure to convert his son to a Thor fanatic went down a storm with Deadpool's Ryan Reynolds and Wonder Woman's Gal Gadot, who both simply reacted to the post with laughing emojis.

Featured image credit: Alamy / DPA Picture Alliance

Chris Hemsworth trolled by his own brother over his legs after sharing backstage pic