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Ethan Suplee knows practice makes perfect, especially in the gym.

The "My Name is Earl" actor posted words of affirmation along with a workout selfie where he showed off his toned muscles on Instagram.

Suplee, 46, began a lifestyle change nearly 20 years ago when he reached more than 550 pounds, and has since transformed his outlook toward food and health. 

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Ethan Suplee walks red carpet wearing a grey shirt and hat, previously weighed more than 500 lbs

Ethan Suplee began transforming his outlook on health two decades ago. (Getty Images)

"Once upon a time, the whole world was an impossibility," he wrote. "Conquering all of it is still impossible, so I’m just concentrating on today."

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Suplee added," If today becomes too much, I will focus on right now. Right now, I’m ok, I will beat right now."

He regularly updates his social media followers about past issues with weight, and shares inspirational messages along with transformation photos.

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In the multi-shot post, he shared a photo from an earlier acting gig before revealing his new physique. 

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In October, he shared tips toward achieving lean muscle mass while still eating "refined carbs, sugar and seed oils."

His commitment to his health and wellness inspired his podcast, "American Glutton," which launched three years ago and delves into "the ambiguities of moral ‘truth,’ cooking, and eating."

Ethan Suplee, Ryder Strong and Ben Savage star on Boy Meets World

Suplee worked on the '90s teen sitcom, "Boy Meets World." (Getty Images)

Jason Lee and Ethan Suplee read a note on My Name is Earl show

Jason Lee and Ethan Suplee starred on "My Name is Earl" for four seasons. (Paul Drinkwater/NBC)

The "Mallrats" star, who will soon join forces once again with Kevin Smith and Jason Lee in "Twilight of the Mallrats," admitted he's been on a diet more-or-less his entire life.

By the time he was 10, Suplee said he weighed over 200 pounds and his father put him on a liquid diet, but his mother took him off, and he "had a big upsurge of weight gain."

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Ethan Suplee wears a grey suit with a pink shirt at Hollywood event

Ethan Suplee now hosts his own podcast where he discusses everything from food, to nutrition and cooking tips. (Jerod Harris)

Suplee estimated on the premiere episode that throughout his life, he’s "gained and lost probably close to 1,000 pounds."

With a better understanding of health, he uses "food as an energy source" and his current goal is to get a six-pack.

"... I’m not far off. Pretty f----ng close actually," he shared. "So it’s an utterly vain goal. I don’t care. Who cares? I’ve never had a vain goal like that before."

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