外太空的莫扎特

황보

Dawang

荣梓杉

Xiaotian

陈思诚

Mozart (voice)

황양전첨(황양뎬톈)

Ding Jieling

姚晨

Niu Yuxia

范偉

Grandpa Xiaotian

贾冰

Teacher Deng

许君聪

Scarface

梅婷

Ren Xiaotian's mother

Lang Lang

Lang Lang

황각

Ding Jieling's father

于洋

Fan Tiantian

Xue Xihao's mother

桑平

Ma Yuan's father

Yang Jinci

Twins' father

이명헌

Police

李澤宇

黃星羱

Ouyang Baoluo

우파(위보)

[Mo Mo's father]