Films
* The Wog Boy (2000): This iconic comedy about a young Greek-Australian man searching for his identity launched Giannopoulos's career. He wrote, directed, and starred in it.
* The Wog Boy 2: Kings of Mykonos (2010): He returned to the role of "Stavros" for this sequel, once again co-writing and directing.
* The Merger (2018): A feel-good comedy about a small town football team bringing in a team of asylum seekers, Giannopoulos plays a coach.
* The BBQ (2014): Giannopoulos co-wrote and starred in this comedy about a family gathering that spirals into chaos.
* The Kings of Mykonos (2009): He also wrote and directed this film, a prequel to "The Wog Boy 2," focusing on the backstory of the main characters.
Television
* Acropolis Now (1989-1992): Giannopoulos gained early recognition for his role in this popular comedy series about a Greek-Australian family.
* Pizza (1987-1989): Another early series showcasing his comedic talents, he played a character named "Nick" in this show.
* Kath & Kim (2002-2007): He had a recurring role as "Mick" in this beloved Australian sitcom, playing Kim's father.
* The Wog Boy: The Series (2015): Giannopoulos continued the "Wog Boy" universe with this short-lived television series, reprising his role as Stavros.
* The Librarians (2014-2018): He had a guest appearance in this fantasy series, playing the character of "The Alchemist."
This list is not exhaustive but provides a good overview of his most well-known film and television appearances. Nick Giannopoulos has also appeared in numerous other projects, showcasing his versatility as a writer, director, and actor.