Alex Dimitriades is an Australian television, film and stage actor of Greek descent. He is best known for his roles as Nick Polides in the 1993 romantic comedy film The Heartbreak Kid and as Nick Poulos in the 1994 television teen drama spin-off Heartbreak High. He won critical acclaim for his role as Ari, a troubled second generation Greek Australian in Head On (1998), based on Christos Tsiolkas's 1995 novel, Loaded. He won the Film Critics Circle of Australia award for Best Actor for the role and was nominated for the AFI Award for Best Actor. He later starred in The Slap (2011) based on Tsiolkas's novel of the same name and won the AACTA Award for Best Lead Actor. He also starred in the titular role of the drama series, The Principal (2015) and won the Logie Award for Most Outstanding Actor. He has also had roles in a number of British-Australian co-productions such as The Cry (2018) and The Tourist (2022).