The automated creature, known as the I-Fairy, oversaw the wedding of Tomohiro Shibata and Satoko Inoue in the capital, Tokyo.
The couple decided to use the robot as they are both connected with Japan’s thriving robotics industry.
Since robots had brought them together in the first place, they said, having one officiate at their wedding was a natural choice.
During the ceremony, I-Fairy – which has flashing eyes and plastic pigtails – instructed the groom to lift the bride’s veil for the kiss.
The wedding took part in a rooftop restaurant in the Japanese capital.