Kieu Trinh is known as one of the "go to" Vietnamese actresses for independent and art house films, With no professional acting background, she was discovered by director Nguyen Vo Nghiem Minh for his first feature film The Buffalo Boy. The film won critical acclaim and launched Kieu Trinh's acting career. Since then, she has starred in more than 50 TV series and 10 feature films. Her daughter Thanh Tu is also one of the rising stars in Vietnam. Song Lang is the 6th film this mother-daughter duo both appeared together in.

Born and raised in Saigon, Vietnam, Leon Lê moved to the US at the age of 13. An accomplished actor, dancer, singer with credits including Broadway, film and TV, he always had a passion for filmmaking. As a self-taught filmmaker (writer, director, editor), his shorts Dawn and Talking to My Mother, gained him attention at film festivals, garnering awards including Best LGBT short film, Best Director. Song Lang is Lê’s first feature film, an elaboration of his interrupted upbringing in Vietnam and nostalgic tribute to his beloved Cai-luong. Coincidentally, the film was completed in 2018, on the 100th year anniversary of this wonderfully unique theatrical art form. Leon currently lives in NY and Vietnam.