Oh! My Emperor (Chinese: 哦！我的皇帝陛下; pinyin: Ó! Wǒ de huángdì bìxià) is an ancient costume love idol drama jointly produced by Wajijiwa Entertainment, Tencent Pictures and Wugu Yuanfeng Culture Media, directed by Gao Bo, Gu Jiacheng, Wu Jiacheng, Xiao Zhan, Zhao Lusi, Peng Chuyue, Chen Zexi, Yan Xujia, Xie Lintong and Song Nanxi co-starred, and Wang Yu played a special role.

The play tells the story of Luo Fei Fei, a 21st-century doctor, who is transported to a mysterious world of the past: Huang Dao Guo. In that nation, leadership is rotated among the twelve constellations every thousand years. The current emperor is Bei Tang Yi of the Capricorn constellation.

The play is divided into two seasons. The first and second seasons were broadcast exclusively on Tencent Video on April 25, 2018, and May 23, 2018.