Dianna Agron & Chris Messina Star in Heart-Breaking Music Video for Sam Smith's 'I'm Not The Only One' - Watch Now!

Check out the premiere of Sam Smith‘s latest music video for “I’m Not The Only One“!

The 22-year-old British singer enlisted the help of Glee‘s Dianna Agron and The Mindy Project‘s Chris Messina to act out the heart wrenching pop-ballad in the Luke Monaghan-directed clip.

PHOTOS: Check out the latest pics of Sam Smith

“So excited to share this with you all!,” Sam tweeted along with a link to the visual. “I hope you enjoy x.”

Check out Dianna, 28, and Chris, 39, in behind the scenes images from the set of “I’m Not The Only One” below!