Zayn Malik Twitter
Cheeky Zayn posted the snoozy photo of Harry (taken while he was unaware of any hijinks, poor chap), writing, "Harry wake up!! :D"
Harry, later finding out about the tweet, seemed a little grumpy about the pic (well, we're sure he's not really mad), writing, "@zaynmalik I have just seen this. I feel so vulnerable. I am going to destroy you. Grrrrrr"
We can only hope that means some form of revenge, though seeing sleeping pics of Zayn is nothing new!
Gallery | Kiss You: Best One Direction Video Ever?
Gallery | Zayn's Hair Evolution: The Ice Cream Swirl
Gallery | What Does Harry's Hair Say About Him?