To Whom It May Concern: Ka Shen's Journey (Chinese: 家倩的人生之旅; pinyin: Jiā Qiàn de Rén Shēng Zhī Lǚ) is a 2009 docudrama about actress Nancy Kwan. Directed and written by former Warner Bros. executive Brian Jamieson, the film depicts Kwan's meteoric rise to fame when she was selected to star in the 1960 film The World of Suzie Wong and the 1961 film Flower Drum Song. In an era when White people played the Asian roles in Hollywood, Kwan's achievement was groundbreaking. The film portrays Kwan's being cast for inconspicuous roles after her early success.

To Whom It May Concern was filmed in locations in several countries, including Cambodia, Hong Kong, and the United States. In Cambodia's 12th-century temple Angkor Wat, Kwan grapples with the death of her son, Bernie Pock, from AIDS at the age of 33 in 1996.

The film is being screened in film festivals internationally. It was awarded "Best Feature Documentary" by American International Film Festival and WorldFest-Houston International Film Festival. Reviewers praised the documentary for its judicious use of archival footage and poignant interviews with Kwan. Several reviewers characterized the clips of Kwan's watching "The World of Suzie Wong" as unnecessary and unpolished.