Jenner, 65, filed for a name and gender change in the court on September 15, reported People magazine.
On Friday, Jenner's lawyers appeared in court, and a Los Angeles judge approved the request. Jenner was not present in the courtroom, based on a live stream of the proceedings.
According to court documents, Jenner formally requested to be called "Caitlyn Marie Jenner" instead of "William Bruce Jenner" in the name and gender petition.
The filing states Jenner also requested that information necessary for the process, such as her medical history, be sealed.