Thank god for the third Hemsworth brother.

While Chris Hemsworth uses his Instagram to post pictures of Australian sunsets and stuff -- which admittedly are beautiful, but that's not why we're following him -- Luke Hemsworth knows wassup. Just look at his latest post, captioned, "Hey @chrishemsworth do you even lift bro?"

Arms.

ARMS.

EXCLUSIVE: Did Mark Ruffalo Confirm Cate Blanchett Is New 'Thor' Villain?

Like, is Chris even flexing in this? We need to know, is this flexed or unflexed?

What did Luke set the contrast to? Like a 15? Is there even contrast on this?

We don't even caaaaaaaaaaaaare. We just want those Thor arms around us.

Guard your man, Elsa Pataky.

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Neither Chris nor Luke has been the Hemsworth making headlines lately -- that would be Liam, who recently reunited with former fiancé, Miley Cyrus. Even if Chris says he knows nothing about it.

"I would find out through the press," the Avengers actor claimed on the Kyle & Jackie O radio show. "I find out last most of the time."

Now, find out what designer Neil Lane told ET about Miley's engagement ring that she appears to be wearing again: