Tom Hiddleston joined Instagram on Monday, and he's already getting ragged on by "Avengers" co-star Robert Downey Jr.
Just hours after the "Night Manager" actor joined the social media platform, he got a warm welcome from Downey, who wrote, "Join me in welcoming the biggest T. Stark fan of them all to Instagram! @twhiddleston."
Downey posted a photo of Hiddleston wearing the now-infamous "I Heart T.S." tank-top -- Hiddleston is dating Taylor Swift, in case you missed it.
But Downey seems to believe the tank is for his "Avengers" character, Tony Stark.
Somebody should let Swift know.