Former California governor Arnold Schwarzenegger on Saturday laid a floral wreath at the Bataclan concert venue where 90 people were killed during the November 13 terrorist attacks in Paris.

"Paris, je t'aime (I love you) and I pray for you," reads the card on the wreath of orchids and roses, signed simply "Arnold".

The actor and former body builder is in Paris to lend star power to the UN climate conference under way in the French capital.

Michele Sabban, president of Regions of Climate Action (R20), a non-profit environmental organisation founded by Schwarzenegger, accompanied him to the wreath-laying.

The Bataclan, the site where the worst of the attacks took place on a night that saw 130 people killed and hundreds more injured across Paris, has seen a steady stream of visitors coming to pay their respects.

Other Hollywood stars in Paris for the climate talks include Leonardo DiCaprio, Sean Penn and Robert Redford.