Kelly Osbourne has admitted that part of her recent and dramatic weight loss is due to gastric sleeve surgery she had “about two years ago.”

Speaking to the “Hollywood Raw with Dax Holt and Adam Glyn” podcast Thursday, Osbourne said, “I had surgery; I don’t give a f–k what anyone has to say,” according to People.

“I did it, I’m proud of it, they can suck s–t,” she added, which may be a line from “Anna Karenina” — we’re not sure.

Osbourne, who says she’s lost around 85 pounds, was careful to couch the surgery — which removes 75-80 percent of the stomach and is the most commonly performed bariatric procedure in the world, per UCLA — as part of a holistic approach to weight loss that includes diet and exercise.

“The kind of surgery I had … if you don’t work out and you don’t eat right, you gain weight,” Osbourne, 35, said. “All it does is move you in the right direction. So, anyone who’s thinking of doing something like this, really think about that.”

She also added that she quit drinking in advance of the surgery, and explained that she “had to do a year of stand-alone therapy to prepare myself for the surgery before I even had it.

“What people don’t realize is, it cuts out this hormone that if you have addiction issues, it stops your craving and it makes you not emotionally eat, which is a huge problem for me.”

Osbourne also notes that, understandably, “My weight loss made me resentful at Hollywood. So f—ing resentful. Because when I was fat, I was invisible. They didn’t want to work with me, they didn’t want to do anything with me.

“Now in retrospect, I know exactly who I’ll work with and who I won’t,” she added. “Because I know who called me fat, I know who didn’t want to work with me. I know exactly who said it. I’ve got really thick skin, but I take that, and I put it into my memory bank. I remember what you said about me, and that’s the best revenge.”