After undergoing an alleged 75-pound weight loss, Melissa McCarthy looks better than ever!

The actress, 45, continues to flaunt her killer curves on the red carpet and Instagram, showing off her fabulous frame.

So — what is her secret?!

RELATED: ‘Rich Kids of Beverly Hills’ Star EJ Johnson Flaunts Svelte Figure After 180-Pound Weight Loss — See the Photos

melissa mccarthy getty images, melissa mccarthy seven7
Getty Images, Melissa McCarthy Seven7

Melissa before (left) and after (right).

Celebrity trainer Charlene Ciardiello — who hasn’t worked with the actress — says eating salads and consuming protein, combined with an exercise plan, is the key to successfully shedding those unwanted pounds!

Keep working hard, girl!

Check out our gallery of Melissa’s weight loss below!