• 
  Ka-Wai Kam

  regizor

• 
  Tai-lee Chan

  scenarist

• 
  Donnie Yen

  Henry Chen
• 
  Joe Chen
• 
  Kang Yu
• 
  Ming-Kit Lok

  Jack Li (as Lok Ming-Kit)
• 
  Jess Liaudin

  David Jones
• 
  Harry Oram

  Fighter Harry'O

• 
  Wai-Ho Auyeung

  (as Benjamin Auyeung)
• 
  Brahim Achabbakhe

  Brahim MMA Fighter
• 
  Jai Day

  Henry's Step Father
• 
  Tom Caserto

  Tom MMA Fighter
• 
  Semiquaver Iafeta

  Semi MMA Fighter
• 
  Alfred Cheung

  Chief Huang
• 
  Billy Lau

  Gladys's father

• 
  Fung Li

  Jack's grandmother
• 
  Ying Kwan Lok

  Guan's father
• 
  Fung Woo

  Fang Shu Ren
• 
  Chiu-Kin Lau

  Gordon Xiang
• 
  Ka Wah Lam

  Patrick Lin
• 
  Bruce Kwan-Chi Tong

  Bruce Guan
• 
  Chris Kwan-Yiu Tong

  Chris Guan (as Chris Tong Kwan-Yiu)
• 
  Gladys Li

  Gladys Wang
• 
  Wai-Ho Auyeung

  Ben Sir
• 
  Tin-Lung Koo

  Boss Zhang
• 
  Qianqian Yun

  Jenn Zhou
• 
  Andrew Sit-Chun Tse

  Jake Huang

• 
  Connie Wong

  producător
• 
  Jing Wong

  producător
• 
  Donnie Yen

  producător