How Matt Damon Lost 15kg For 'The Odyssey'

Matt Damon lost 15kg for ‘The Odyssey’

The actor cut down to 75kg for Christopher Nolan's upcoming epic. "I haven’t been that light since high school," he said

IN CASE YOU missed it, the most anticipated film of 2026 is Christopher Nolan’s The Odyssey, and it stars Matt Damon. While Odysseus himself was primarily known for his wits, as opposed to his braun, Nolan had a very specific vision for the character, requiring Damon to get leaner while adding the muscle of a Greek warrior. As a result, he got down to a weight he hasn’t been since high school.

“I was in really good shape. I lost a lot of weight,” Damon told Jason Kelce on the New Heights podcast. “[Nolan] wanted me lean but strong… I used to walk around at between 185 and 200 [84-90kg], and I did that whole movie at 167 [75kg]. And I haven’t been that light since high school.”

Matt Damon The Odyssey weight loss

How did Damon do it? He was already rather lean at 90kg before production began, so getting down to 75kg was never going to be easy. “It was a lot of training and a really strict diet,” he said. To be more specific, Damon said that the biggest change in his diet was that he “stopped eating gluten.”

Damon’s Odyssey prep is a far cry from some of his previous roles. He gained 15kg for 2009’s The Informant by “eating like crazy and drinking dark beer,” he told Entertainment Weekly at the time. “Between meals on set, I’d eat McDonald’s and then Doritos on top of it. It was absolute heaven.”

We’ll see if Damon’s hard work has paid off on the big screen. The Odyssey is in theatres July 17.

By Cayle Reid

Cayle Reid is Associate Content Editor at Men's Health Australia, covering everything from developments in fitness and nutrition to the latest innovations in performance gear. When he's not tracking down a celebrity's fitness routine or putting a new product to the test, he spends his time staving off injury on long runs, surfing and staying up late watching sports in incompatible time zones.

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