Mike Tindall has accidentally revealed his wife Zara's private Instagram account handle in a huge blunder.The former England rugby star reposted a photo shared by journalist Di Stewart, where she could be seen interviewing Mike, 44, and Zara, 42, at the Ryder Cup, a major golf competition that is currently being held in Rome, Italy. In the post, the journalist had tagged Zara's private profile, which has 207 followers. However, OK! has chosen not to reveal the account handle to respect her privacy.