Robbie Williams and Kate Hudson have been appointed as ambassadors for WW, formerly known as Weight Watchers.

Williams will front a new campaign, launching December 26, and posted on Instagram 'I have announced some health goals for the new year. I want to get fit and healthy, to be my best version of me for my family, my friends and my fans. And that’s why I’ve decided that WW is going to be my partner on this wellness journey. As a #WWambassador, I’m joining the community of millions around the world who are building healthy habits for real life with WW'.