As you can see, Rupert Grint went full-out in disguise wearing (what he believes was) Gary Oldman’s old wig when he played Sirius Black, as well as donning a full beard and dark ...

Daniel Radcliffe, John Krasinski, and even Prince Harry have all done it, to great effect. To throw it back to '90s pop culture, Trekkies coined the term "growing the beard" as the opposite of ...