is dropping jaws after an incredible amount of weight loss.
A photo that has gone viral shows McConaughey with his mother as they left an Austin church this weekend.
According to E News and the Today Show, McConaughey is losing the weight to prepare for a role in the film "The Dallas Buyer's Club." He will play Ron Woodruff.
Ron is suffering from AIDS, which explains the weight loss.
Check out the photos and video below: