Downey Jr., 51, welcomed his Avengers costar to Instagram on Monday by poking fun at Hiddleston’s relationship with Taylor Swift. The actor took to his own Instagram account to post the infamous picture of Hiddleston wearing his “I [Heart] T.S.” shirt.
“Join me in welcoming the biggest T. Stark fan of them all to Instagram!” he captioned the comical shot.
And while the two may play enemies in the beloved franchise, it seems there’s nothing but love between Loki and Tony Stark offscreen.
Hiddleston, 35, finally joined Instagram on Tuesday, and within hours, the actor had garnered over 149,000 followers – and counting.
The actor made his Instagram debut with a photo of himself decked out in his Loki costume.
“He’s back!” he captioned the pic.