"The Decoy Bride" is from a few years ago (2011). I vaguely remember seeing trailers for it. I don't think I ever saw, it sure didn't seem familiar at any point. Amusing enough for a 90 minute movie. In the movie Alice Eve is an extremely popular actress who is stalked by the paparazzi constantly. She is supposed to be marrying David Tennant, a mildly successful author. She wants to have a paparazzi free wedding, but that is proving to be impossible. So they plan a stealth wedding for nearly the end of the earth, the outermost of the Outer Hebrides. Still doesn't throw everyone off the scent, so they come up with a crazy plan to stage a fake wedding with a local woman, played by Kelly Macdonald. There's something about her I find quite charming and appealing. Probably her voice as much as anything. It took me a bit to stop thinking "it's Merida from 'Brave.'" Anyway of course nothing goes to plan and much hijinx ensues.
Apparently the island this took place on, Hegg, is fictitious. Was filmed mainly on the Isle of Man.