Wearing a costume with similar features to that of The Joker, he walked between rooms trying to find team-mates to scare.
Not many were spooked out by the costume though, especially Miralem Pjanic who shared a high-five with his team-mate as he casually walked past in a corridor.
Wojciech Szczesny was also welcoming of the dressing room joker, even sharing a high five with the leg portion of Ronaldo's costume which featured another clown appearing to carry the Portuguese star.
Ronaldo rescued Juventus from an embarrassing slip up in mid-week, scoring a penalty deep into stoppage time in their 2-1 home victory over relegation threatened Genoa.
The Bianconeri will be hoping for an improved performance at Torino this weekend, but will need to cut out the clowning around on the training ground if they wish to stay top of the Serie A table.
