Reality star Kim Kardashian admits she lost 50lbs (about 22kg) after she had her baby North.
On the Jay Leno show Kim said: "I can honestly say it was the greatest challenge of my life."
Kim explained how her larger figure during pregnancy was caused by preeclampsia, a serious condition which raises blood pressure, and also the reason North was delivered over a month early.
She added: "That was a cause for a lot of the swelling and at the time I didn't know what was going on. I got on the scale today and it said that I am 50lbs down. That made me so excited."
Kim Kardashian wasn't pictured in public for months after the birth as she embarked on an exercise regime and strict high-protein Atkins diet to lose her weight.
The star also talked about how well behaved her daughter is, adding: "She never cries. She's a perfect little angel. I hope she grows up to be smart and opinionated like her dad."
The new mother also talked about her and Kanye's wedding plans, saying they may wed in "someplace Parisian" and suggesting next summer as a likely time.