Ilo Ilo, Chen's first feature film, was released on August 29, 2013 in Singaporean theatres. Chen served as director, producer, and writer. According to Chen, the film was inspired by a real life maid who worked for Chen's family when he was a child. After its world debut at the 2013 Cannes Film Festival, Ilo Ilo received a fifteen-minute long "standing ovation" and earned Chen the coveted Camera d'Or. Prime Minister of Singapore Lee Hsien Loong noted Chen's achievement, congratulating him and the film's cast on Facebook.
On 19 October 2013, Ilo Ilo went on to win the Sutherland Trophy for the Best First Film at the London Film Festival. (The same night, one of Chen's tutors at NFTS, Pawel Pawlikowski, won the Best Film Award for Ida).