At least they're still pretty! LOLz!
The couple was so busy partying it up at Ashton's twin brother's wedding, they were probably REALLY excited to catch some zzz's on their 5-hour flight back home.
Aww! We can totez imagine Mila angelically snoozing on Ashton's shoulder.
Or who knows??! Perhaps the twosome were discussing their very own wedding plans!
[Image via Pacific Coast News.]