Did Niall have surgery?

Directioners all over the world were so upset to see photos of Niall with a giant cast on his leg! Turns out, he had a much needed knee surgery. "Hey guys I know most of you have seen those pics today," he tweeted. "Yes I've had major knee surgery, a much larger surgery than first anticipated, but I would like to tell u, it was a complete success!" Yay! What's also great is that he'll have plenty of time to recover since 1D's Where We Are tour doesn't kick off until April 25th! Hang in there, Niall!