Kevin Smith has dropped 51lbs since his heart attack six months ago.



The 48-year-old director took to Instagram to share a before and after shot of his transformation since undergoing emergency surgery and after becoming an ambassador for Weight Watchers.



The filmmaker has been on a plant-based only diet, and his weight loss is largely thanks to Penn Jillette's book 'Presto!', which chronicled his 100lb weight loss, and advice from dietary nutrition researcher Ray Cronise.



Despite his impressive progress, Kevin says he still wants to lose another 10lbs.