If you cast hold person on a sleeping target, would they be aware of it and wake up?

@lunchboxx1990 @JeremyECrawfordIf you cast hold person on a sleeping target, would they be aware of it and wake up? I argue no, but PL say yes I'd make it a DM's call, honestly. Maybe a Wisdom (Perception) check? #wotcstaff

— Mike Mearls (@mikemearls) March 14, 2017