The first series of the Australian cooking game show Celebrity MasterChef Australia began production in early September 2009, and premiered on Network Ten on 30 September 2009.^[1] Matt Preston, George Calombaris and Gary Mehigan returned as judges for the show; however Sarah Wilson did not reprise her role as host from the first season of MasterChef Australia.^[2]

Former world-record holder & Olympic medalist Eamon Sullivan won the series, taking home $50,000 for charity Swim Survive Stay Alive.

Celebrity MasterChef Australia series 1 featured 18 celebrities as contestants. Network Ten officially revealed the first batch on the 3 September 2009 episode of The 7pm Project.^[3] However, several contestants were revealed before Ten's official announcement of their participation.

The contestants included:^[4]

Ten initially announced that actor Steve Bisley would also be a participant, but he later withdrew from the show. The network cited a scheduling conflict for his departure, though the ABC claimed that Ten used it as an excuse; the announcement of his participation on the show was the same day the actor was charged with assaulting his ex-wife Sally Burleigh during an argument between the former couple.^[5] Rachael Finch previously auditioned for the first series of MasterChef Australia, but did not make past the initial rounds.^[6]

• Matt Moran - Heat 1 Pressure test
• Brent Savage - Heat 2 Pressure test
• Kylie Kwong - Heat 3 Pressure test
• Stephanie Alexander - Heat 4 Pressure test
• Tony Bilson - Heat 5 Pressure test
• Katrina Kanetani - Heat 6 Pressure test
• Steven Krasicki - Semifinal 2
• Adriano Zumbo - Semifinal 3
• Andrew McConnell - Grand Finale