Join me in welcoming the biggest T. Stark fan of them all to Instagram! @twhiddleston [1]
Tom Hiddleston officially joined Instagram [2] this week, and his Avengers costar Robert Downey Jr. figured out the perfect way to welcome him. On Tuesday, Tom shared his first-ever snap while dressed up as his character, Loki, and it didn't take long before Robert — who plays Tony Stark aka Iron Man in the franchise — found an opportunity to poke fun at Tom, by way of his blossoming romance with Taylor Swift [3]. "Join me in welcoming the biggest T. Stark fan of them all to Instagram!" Robert captioned a photo of Tom from Taylor's infamous Fourth of July bash [4], where he was photographed in the ocean wearing an "I [love] T.S." tank top. It's so good to finally know what those initials actually stand for.