James Corden has revealed that he has lost over a stone in just five weeks after joining WW.
During an interview with Oprah Winfrey on WW's Facebook page, the talkshow host revealed that he plans to get "so ripped... like The Rock".
The actor turned presenter, 42, said that he joined the group, which was formerly known as Weight Watchers, in the New Year.
He said: "My wife is planning a little circuit for us after this so we do it together. We do these weights and little runs and I moan about it constantly.
"In a year's time, we are all going to be so ripped. It will be crazy. I will be like The Rock."
The Late Late Show host said that he is now an ambassador for WW after revealing that he joined because he was "embarrassed" of his body.
He said that he also joined WW to help change the conversation around health and wellness.
"I want to change the way that I live," he said. "I want to be better for my children and for my family. I don't want to wake up tired, or feel embarrassed when I'm chasing my son on the soccer field and out of breath after three minutes."
Other stars who have used the platform to change their lives for the better include DJ Khaled and Robbie Williams.
Corden, who first hit screens on the scripted series Fat Friends in 2000, said: "The weight is not the issue, it's the wellness of it I am ready to tackle. I'm going to take this year and work towards getting healthy.
"If 2020 taught us anything it was that taking care of yourself has to be a priority. I called WW because I absolutely believe that they have the tools in place to help me make this change."
Corden has previously opened up about his struggles with his weight, per the Daily Mail, and said that the one food he struggles to stop eating is bread.
"'[I have] a sort of battle with food..." he said of one dinner incident. "Then they delivered this basket of warm, fresh bread and we’re like, 'It's happening, we're doing it. Who are we trying to kid?''It’s our nemesis, it's out to destroy us!"