A picture of Mark Hamill in costume as Luke Skywalker for The Force Awakens has been C&Ded all over the place – including the source – so it’s likely legit, but I’m not going to post it myself. The internet being the internet, chances are you’ll have no trouble finding it, even if you don’t want to find it.
If you can’t resist, sites still running it (as of post time) include Indie Revolver and Heroic Hollywood. And it’s been posted multiple times in the Luke Skywalker tag on Tumblr, a trend which will no doubt continue. Catch them while you can!