Jiang Wen
— Lang Guoren
马丽
— Zhou Xiulan
Zhang Chenghao
— Childhood Lang Lang
于和伟
— Lao Cui
何赛飞
— Ou Ya
丁志诚
— Old Policeman
Wang Longshuo
— Young Lang Lang
辛芷蕾
— Teacher Lin
Jiayin Lei
— Second Uncle
葛优
— Wang Ziyue
王传君
— Chu Zhongtian
胡歌
— Mr. Hu
Lu Yi
— Teenager Lang Lang
Donnie Yen
— Alex Yang
李屏賓
— Zhuge Bole
Li Ziwei
— Director
曹操
— Holmes
Gina Alice Redlinger
— Gina's Mother
Jiang Mahu
— Student
Jiang Sanyi
— Student
Sun Yun
AJ Donnelly
— Arenberg
于和伟
— Cui
余皑磊
— Jian Sun
余皑磊
— Sun Jian