Awkwafina
as Billi

Zhao Shuzhen
as Nai Nai

Tzi Ma
as Haiyan

Diana Lin
as Jian

Hong Lu
as Little Nai Nai

Jiang Yongbo
as Haibin

Han Chen
as Haohao

Aoi Mizuhara
as Aiko

Zhang Jing
as Gu Gu

Yang Xuejian
as Mr. Li

Jim Liu
as Doctor Song

Li Xiang
as Aunty Ling

Hongli Liu
as Aunty Gao

X Mayo
as Suz

Hong Lin
as Doctor Wu

Becca Khalil
as Shirley

Zhang Shimin
as Michael

Gil Perez-Abraham
as Tony (uncredited)

Ines Laimins
as Kathy