LOS ANGELES: Janet Jackson has signed on as an executive producer of a documentary on the lives of transgender people around the world. New York-based Brainchild Films announced Monday that Jackson was working on ''Truth'' and would do some of the on-camera interviews.

The documentary begins production this summer and will focus on the lives and struggles of transgender persons. Jackson writes in a statement that she is working on the project to try to stop discrimination of the transgender community.

The 46-year-old sister of Michael Jackson has starred in several films and won five Grammy Awards. ''Truth'' will be directed by Robert Jason, who previously directed a documentary for The Style Network on four transgender New Yorkers.

He says ''Truth'' will feature stories from North America, Europe, Australia and Latin America.