John Goodman is finally talking about his drastic weight loss.

The notable 58-year-old actor, who has starred in films like “Monster’s Inc.,” “The Flintstones” and “The Blues Brothers 2000,” and also as Dan Conner in the hit 90′s sitcom “Roseanne,” caused a commotion back in June when he debuted his new slim figure on the red carpet of an event in California.

Now he’s revealing what made him lose over 100 pounds. He told People:

“I know it sounds sappy, but it was a waste,” the 58-year-old actor tells PEOPLE. “It takes a lot of creative energy to sit on your ass and figure out what you’re going to eat next … I wanted to live life better.”

Mission accomplished: The Treme actor has lost more than 100 lbs. thanks to his healthy new lifestyle. He quit drinking three years ago and hired Mackie Shilstone – a health coach who has trained many athletes including tennis player Serena Williams. Now Goodman has cut sugar from his diet and works out six days a week. “I’m breaking a sweat but I’m not going nuts,” he says.

He is excited about the results though, says Shilstone. “He remembers what it feels like to be extremely heavy and it’s something he doesn’t want again.”

Now, says Shilstone, “John is very agile. When I see him running I get out of the way! He can be a different type of actor now. He can take on athletic parts.”

Before Goodman becomes an action hero, though, he needs to focus on getting a new wardrobe. “I just ordered some nice slacks,” he says. “I finally got them and they’re too big now.”

Source: People.com