London, August 7 : Cristiano Ronaldo has starred in the ' Facial Fitness PAO' advertising campaign.

The Real Madrid footballer is seen promoting a device which you put in your mouth while nodding your head for a face and neck workout to strengthen the muscles, in the Japanese advertisement, Metro. co. uk reported.

The 29-year-old Portuguese star was recently named the world's fittest man by Men's Health magazine and has also launched his own brand of designer underwear. (ANI)