Weight Watchers said it has signed DJ Khaled to be its new social-media ambassador.

The hip-hop impresario will go public with his struggles to slim down by broadcasting them to his millions of followers on Facebook, Instagram, Twitter and Snapchat, according to the dieting giant.

Shares of Weight Watchers rose by more than 7 percent to as high as $47.53 on Tuesday.

DJ Khaled’s first post on Monday about participating in Weight Watchers’ “Freestyle” program — the same diet Oprah Winfrey is on — has already garnered more than 634,000 views on Instagram.

“I already Got rid of 20 pounds and ready for more,” the music mogul wrote to his 8.9 million followers on Instagram and 3.9 million followers on Twitter.

“Ride with me on my journey to greatness. Bless up Weight Watchers!!!”

Khaled joined Weight Watchers in October, according to a spokeswoman for the company. His weight and his weight-loss goals are “confidential” and “for him to answer,” she added.

“We’re inspired by the opportunity to create meaningful connections within his community and spark new conversations about the brand,” the company spokeswoman told The Post.

Weight Watchers shares have surged more than sixfold since Winfrey took a 10 percent stake in the company in October 2015, when she also became a director and the face of the brand.

Experts say Khaled’s involvement may help Weight Watchers attract more men, who currently account for just 10 percent of its customers.

Weight Watchers declined to disclose how much it’s paying Khaled and said his role is different from Winfrey’s.

“She is the face of our Freestyle advertising campaign this winter, in addition to her roles as board member, owner and strategic advisor,” the spokeswoman said.