Los Angeles: Star couple Tom Hiddleston and Taylor Swift are following each other on Instagram. The actor recently joined the photo-sharing site, but a lot of people wondered why he hadn't started following his girlfriend. On Friday, things changed. The couple are both following each other on Instagram, reports eonline.com. He has also started following many of his co-stars and colleagues, including Robert Downey Jr., who gave him a proper shout out on the social media platform, posting a photograph of Hiddleston wearing that "I (heart) T.S." shirt from his Fourth of July vacation.