According to director Yi Hua, he admired Xie Yuan's superb acting skills at first, and went directly to the Beijing Film Academy to inquire. They hit it off, and their understanding of art and life made him feel that the role of Mr. Wang in the film had to be played. It's easy for a teacher who is impressed by the classic teacher image in king of the children to play the role of Mr. Wang who cultivates sports talents. Xie Yuan said that he vowed to perform Little People to the end.
Subsequently, the crew began to look for suitable actors in the resumes and works of many artists, and Liu Xiaofeng and Guo Jin successively entered the director's field of vision. Liu Xiaofeng is recovering from a back injury in his hometown in northeast China. As soon as he heard that there was a movie about the Olympic Games, he agreed to play the role of "colorful marathon" leader and athlete Jin. After reading the script, Guo Jin called the director and said that she could play Guo Xiaoting in The Working Girl, hoping that the director would change her name to Guo Xiaoting.
In this film, Dong Xuan plays a simple town girl Yan Xu who is similar to her. She is a pure woman and has been committed to supporting her childhood marathon runner Kim. For Dong Xuan, who plays a good family in many costume dramas, such as "Civet Cat for Prince" and "Biography of Eight Heroes", the colorful marathon gives her the first chance to show her true colors and simplicity.
Although Chang Xiao, the host of CCTV, has participated in film and television dramas for many times, this film is his first cameo role as an enterprise boss Gao Zong in the name of signing a screenwriter. "Colorful Marathon" also allowed singer Wang to play a reporter for the first time without trimming, making up or retouching. Although they are not familiar with the life of athletes, their enthusiasm has been ignited by the Olympic fire.