Alec Baldwin

Did you notice a svelte Alec Baldwin at Sunday's Screen Actors Guild Awards?

Take a look at other celebrities and their dramatic weight loss

The 30 Rock star says he's lost 30 pounds in four months. Baldwin, who took home his sixth straight SAG Award for TV Comedy Actor, dropped the weight by cutting sugar out of his diet to avoid the onset of diabetes after getting diagnosed as pre-diabetic last May, he told Entertainment Tonight.

Besides his new diet, Baldwin, who is dating yoga instructor Hilaria Thomas, also started an exercise regime, but doesn't often work out with his girlfriend.

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"I do Pilates and spin, but I don't do as much yoga as I'd like," Baldwin, 53, told Access Hollywood. "When we're shooting and I can't work out, I just have to eat less. So I'm very conscious of that. But sugar was the real killer for me — that was the problem. ... I gave up sugar. I lost 30 pounds in four months. It's amazing."