When Iron Man welcomed Loki to Instagram

Robert Downey Jr is all about Tom Hiddleston joining Instagram

Robert Downey Jr is all about Tom Hiddleston joining Instagram.

 

A photo posted by Robert Downey Jr. (@robertdowneyjr) onAug 10, 2016 at 3:29pm PDT

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The award-winning actor posted a shot of Taylor Swift's beau from his Fourth of July vacation (you know the one, where he was wearing his I heart TS tank top) and wrote a hilarious caption to boot.

 

A photo posted by Robert Downey Jr. (@robertdowneyjr) onAug 9, 2016 at 3:09pm PDT

"Join me in welcoming the biggest T Stark fan of them all to Instagram!" he wrote poking a bit of good-natured fun at Hiddleston's high-profile romance with the pop princess.

Robert Downey Jr and Tom Hiddleston

The 35-year-old Brit joined the social media platform on Tuesday and posted his debut shot in his Marvel character Loki.

"He's back!" Hiddleston wrote presumably from the set of Thor: Ragnarok, which has been filming in Australia over the past several weeks.

"Exciting news! Mid-day is now on WhatsApp Channels Subscribe today by clicking the link and stay updated with the latest news!" Click here!