Lachy Hulme (born 1 April 1971) is an Australian actor and screenwriter. He has written several films and has appeared in a number of Australian and US film and television productions. His roles have included CIA Agent Robert Wheeler in The Crocodile Hunter: Collision Course, Sparks in The Matrix Reloaded and The Matrix Revolutions, and Immortan Joe and Rizzdale Pell in Furiosa: A Mad Max Saga.

Hulme was born in Melbourne, Victoria where he has lived most of his life. Hulme completed his secondary-schooling at Melbourne's Wesley College, graduating with honours in drama, appearing in school theatrical productions such as South Pacific and Rover in 1988. His early career included appearances in theatre productions Rinaldo 441 and Sexual Perversity in Chicago and roles in Australian TV series Blue Heelers, Stingers and White Collar Blue.

Hulme's first film role was starring in the Australian 1994 thriller The Intruder, directed by Richard Wolstencroft but the film was not released due to the sudden closure of the production company Boulevard Films (it was belatedly released on DVD in 2005). In 1997, Hulme wrote the screenplay for the Canadian action-thriller Men with Guns directed by Kari Skogland (not to be confused with the similarly titled US film directed by John Sayles that was released the same year).

In 2000, Hulme appeared in the Australian thriller Four Jacks, directed by Matthew George. Hulme received the prize for best actor at that year's Melbourne Underground Film Awards.

In 2001 Hulme re-teamed with George when the latter directed the controversial film comedy Let's Get Skase which Hulme both co-wrote and starred in. The film's premise was inspired by the real-life comedy event staged by Andrew Denton back in the 1990s on his late-night show Denton in which he had staged a telethon called Chase for Skase to raise funds to hire a kidnapper to bring fugitive businessman Christopher Skase back to Australia from Spain where he had moved following the collapse of his business empire in 1991. The film was a satirical comedy in which Hulme played the leader of a rag-tag gang of hired kidnappers who plan to break into Skase's Spanish mansion and smuggle him back to Australia to face his creditors. Unexpectedly, the real-life Skase died in Mallorca in August 2001 whilst the film was in post-production, causing some criticism of the timing of the film's release shortly afterwards.

In 2003, Hulme scored roles in the sequels to the smash-hit science-fiction film The Matrix. He played the role of Sparks, one of the free-born crew members of one of the hover-ships in the films The Matrix Reloaded and The Matrix Revolutions, both films shot in Sydney. He also reprised the role for the Enter the Matrix video games. He wrote an introduction to the 2003 edition of Dick Russell's 1992 book The Man Who Knew Too Much about Richard Case Nagell.

During preparations to film The Dark Knight (2008), the sequel to Batman Begins (2005), it was reported that Hulme was being considered for the role of the Joker. Ultimately, the role went to fellow Australian actor Heath Ledger. Hulme later said that he had never been in the shortlist for the role; he had never even met the film's director, Christopher Nolan, despite media reports to the contrary.

In 2006, Hulme played the role of MacDuff, alongside Sam Worthington in Geoffrey Wright's adaptation of William Shakespeare play Macbeth, in which the play was set amongst Melbourne's criminal underworld. Although the film received mixed reviews and fared poorly at the box office, Hulme's performance received considerable praise. That same year, Hulme played a brash, foul-mouthed record company executive in the Australian film comedy BoyTown directed by Kevin Carlin and reprised the role in the unreleased spin-off mockumentary BoyTown Confidential directed by Tony Martin.