Oh My God is a sci-fi romantic comedy revolving around a couple who is desperate to conceive a child. Others cast alongside Lay are Cheney Chen (Chen Xudong), who trained under Cube Entertainment and starred in the movie Tiny Times, and actress Jacqueline Li (Li Xiaolu) from the recent movie Forbidden Kiss.
| Actor | Role |
|---|---|
 Chen XuedongChen Mo | Chen Mo |
 Li XiaoluLu Mi Jia | Lu Mi Jia |
| JJiang WenMo Han | Mo Han |
 Chen ChushengMa Ke | Ma Ke |
 Yu JinweiMr. Nan | Mr. Nan |
 Zhang ZiyiAuntie | Auntie |
 Zhang YixingLe Yi | Le Yi |
 Li YouweiNot listed | Not listed |
 Wu XiaoyuNot listed | Not listed |
 Xing YuNot listed | Not listed |
 Zhang Yao[Little aunt] | [Little aunt] |