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Watch: Chris Hemsworth's huge arm muscles have brought scrutiny on his legs
Chris Hemsworth's right bicep has become a meme after he shared a picture of himself online in which his upper arm appeared the same size as his seven-year-old child.
The 37-year-old Thor star posted a picture of himself on Instagram walking down the street, holding hands with one of his seven-year-old twin sons.
Hemsworth's upper-arm muscles are so huge they appear bigger than his son's head, while his calf muscles appear to be average size, and therefore dramatically out of proportion.
His older brother - 40-year-old actor Luke Hemsworth - teased him by commenting: "Bro?! You’ve been skipping leg days again?!"
Hemsworth captioned the picture: "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'. Lucky I have two other kids."
Other Instagram users joined with Luke to mock Chris's arm to leg muscle ratio, with one commenting: "Probably because Superman doesn’t skip Leg Day."
The post prompted amused responses from fellow Hollywood stars, including Avenger's co-star Josh Brolin, Ryan Reynolds, star of Marvel's Deadpool movies, and Gal Gadot, who play's Justice League's Wonder Woman.
Hemsworth and his wife, Spanish model and actress Elsa Pataky are parents to nine-year-old daughter and seven-year-old twin sons.
Watch: Chris Hemsworth's son wants to be Superman!