Actor Chris Hemsworth's twin sons have decided to join their big sister and all dress up as Wonder Woman for Halloween.

The Avengers star reveals his three-year-old boys, Tristan and Sasha, have no interest in becoming mini versions of dad's famous Thor comic book character, and will instead be dressing alike with five-year-old India after falling in love with the Amazonian warrior, portrayed in the summer (17) blockbuster by Gal Gadot.

"I asked my kids the other day, 'cause we're gonna go trick or treating, what they wanna wear for Halloween," Chris recalled on breakfast show Good Morning America. "At the same time... they all said, 'Wonder Woman!'

"I was like, 'That's awesome. (But) you know, what about Thor?' And at the same time, they all went, 'No!'"

The Australian action man, who is married to actress Elsa Pataky, then tried to get the youngsters to name his god of thunder as the more powerful superhero, but they didn't agree.

He shared, "I said, 'Who's stronger?' (They replied) 'Wonder Woman!' So, I'm happy to play second to Wonder Woman."

Chris isn't the only star whose ego has taken a blow over their kids' Halloween picks. Over the weekend, Kristen Bell's four-year-old daughter, Lincoln, made mom dress up as Frozen character Queen Elsa, even though the actress actually voiced Princess Anna in Disney's hit animated 2013 movie.

She shared a photo of herself reluctantly posing in a powder blue dress on Instagram on Sunday (29Oct17), and captioned it, "When your daughter demands you BOTH be ELSA for Halloween...you GRIN AND FORKING (sic) BEAR IT. #Halloween".

Kristen, who also shares two-year-old girl Delta with husband Dax Shepard, will soon reunite with co-stars Idina Menzel and Josh Gad to begin filming Frozen 2, which will be released in November, 2019.