While the NYC set gives away the setting for the highly-anticipated film, rumours are the rest of the story is set in space…
Chris also posted a photo of the pair on his Instagram account, "Just sellin papers with my mate @twhiddleston #parttimejob#thorragnarok @taikawaititi".
The duo, who first met in 2009 when they starred in Thor, have both gushed about each other and their "bromance" ever since.
On the red carpet in 2013, they joked about their blossoming friendship.
"We adopted him. He's one of the Hemsworths," Chris told reporters.
To which Tom quipped: "I am like the runt of the litter. You know when you get kittens and they're all black and white? And I am like the tabby one."