Kevin Smith has dropped 51lbs since his heart attack six months ago.<br /><br /><br /><br />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.<br /><br /><br /><br />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.<br /><br /><br /><br />Despite his impressive progress, Kevin says he still wants to lose another 10lbs.<br /><br />
