True love knows no bounds, except maybe battery life.

While same-sex couples across America celebrated their right to marry this weekend, festivities of a more mechanical sort were happening in Tokyo.

Frois and Roborin. Image: Screenshot/Maywa Denki

On Saturday, robot groom Frois and robot bride Roborin were married. In a ceremony officiated by the emotional humanoid robot Pepper, the two formalized things and even shared a kiss, the Daily Mail reported.

The wedding was organized by Maywa Denki, an art collective conceived by two brothers, Masamichi and Novmichi, according to the company biography, that make nonsense machines and even musical instruments.

The wedding invitation. Image: Screenshot/Maywa Denki

The ceremony on June 27, 2015. Image: Corbis Images

The bride, Roborin, was created by robot inventor Todo Takayuki, and has a face apparently modelled after the star of Japanese girl group AKB48, Yuki Kashiwagi. Frois was created by Maywa Denki and is described as having "bath chair of the head," or so says Google Translate.

The event and buffet was attended by 100 lucky guests, who paid 10,000 yen (US$81.31) for the privilege.

While this may be one of the first robot-to-robot unions, robots have been participating in human weddings for a while now. In 2007, a robot named Tiro introduced a South Korean couple to guests at their wedding, and in 2010, Japanese couple Tomohiro Shibata and Satoko Inouye were married by a four-foot tall robot, I-Fairy.