Here's the "Clerks" writer-director's before picture:
And here he is after, almost unrecognizable sans whiskers:
If Smith looks thinner without the beard, it's not just the loss of facial hair at work. He has eliminated processed and added sugars from his diet, writing on Instagram last week that he was down about 20 pounds.
Over the summer, Smith told ComicBook.com that he was also walking 5 miles a day.
Smith's weight made headlines in 2010 when he was booted from a Southwest Airlines flight after the airline said he couldn't fit in one seat. The airline later apologized.
"Yoga Hosers," which stars Johnny Depp, is set for release next year. The film also features Depp's daughter, Lily-Rose Depp, as well as Smith's daughter, Harley Quinn Smith.