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Someone has clearly been hitting the gym.

Chad Rogers, who starred on Bravo's "Million Dollar Listing" for the show's first three seasons, reappeared in Malibu this week -- and looked like a totally different person.

The former reality TV star, who sported Justin Bieber-bangs and an extremely slim frame on on the real estate series, flaunted his new and improved physique while hiking earlier today. With his ridiculous six-pack, pecs and bulging biceps on display, Rogers has definitely bulked up A LOT since his time on TV.

"Being "fit for success" is important to me because it has enabled me to inspire people through my recent body transformation and mega success in business," he says of his new lifestyle in his entry for Men's Health's "Guy Search" contest. "If I can do it anyone can do it! I work out w/ my Equinox trainer 4 days per week for 1 1/2 hour sessions. We start out w/ 30 minutes of mobility work to get warmed up before each 1 hour workout. My food is delivered to me which keeps me 100% on track."

"I'm very disciplined w/ my diet and cut out all alcohol and desserts. I get at least 8 hours of sleep which is important for a very productive work day," he adds.

Well, it's definitely working for him. We remember when he used to look like this:

Check out more sexy stars in the gallery above!

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