徐天佑
— Kin / Chan Tsz Kin
黃又南
— Him / Ho Ka Him
蔡卓妍
— Hoi Yee / Lam Hoi Yee
衞詩雅
— Yan / Leung Wing Yan
吳肇軒
— Little Brother
梁雍婷
— Cat
梁祖堯
— Austin
白只
— Uncle
朱栢康
— Him's elder brother
歐錦棠
— Him's Father
文雪兒
— Hoi Yee's Mother
章國明
— Hoi Yee's Father
杜德偉
— Kin's Father
盧海鵬
— Him's Grandfather
賈曉晨
— Kin's Mother
Kwok Siu Kit
— Interviewee for the Space Museum Vacancy
鄧梓峰
— Manager of the accountant firm
黃定謙
— Interviewee for the Space Museum Vacancy
楊偉倫
— Interviewee for the Space Museum Vacancy
盧覓雪
— Host of the TV show
曹捷
— Guest speaker of the TV show
張錦霞
— Woman on the queue for tamagochi