Daniel ("Danny") Thomas Green (born 9 March 1973) is an Australian professional Light Heavyweight Boxer and former Olympian, who is nicknamed The Green Machine. In March 2008 he retired as the WBA light heavyweight world champion, only to announce his return in February 2009.

Green was born on 9 March 1973 and grew up in Doubleview, a suburb of Perth, the capital of Western Australia and he attended Newman College in Churchlands.

Green participated in kickboxing and martial arts throughout his youth, in addition to his involvement in Australian Rules Football. He began boxing at 18. He attended a clinic to assist with preparation for the next Australian Rules Football season. Noted trainer Pat Develerz convinced him that he possessed significant natural boxing ability. Green took him at his word and commenced a successful amateur career, with Develerz as his trainer.