Tom Hiddleston has joined Instagram – and it didn't make anymore more happy than Robert Downey Jr.
Robert took this as a chance to take the piss out of Tom and his infamous "I <3 T.S." t-shirt.
He wrote on the social media app: "Join me in welcoming the biggest T. Stark fan of them all to Instagram! @twhiddleston."
It was a small and sly, but great T.S. joke.
However, the joke made thousands of people flock to Tom's new page, and even though only one picture is uploaded, he's already gained more than 500,000 followers.
Mr Hiddleston captioned his first picture: "He's back!," as he's dressed as Loki for his new movie.
We hope this means loads of HiddleSwift pics.