Jessica Lee Rose is an American-New Zealand actress who first gained popularity after playing the role of lonelygirl15, a fictional teenage homeschooled character named Bree who appeared in YouTube video blogs, beginning in June 2006. In September 2006, the Los Angeles Times outed the character, destroying any mystery surrounding the possible fictionality of lonelygirl15, which thrust Rose into the mainstream spotlight while also increasing the viewership of the series. In 2007, Rose won a Webby for this role.

lonelygirl15 is an American science fiction thriller web series created by Miles Beckett, Mesh Flinders, Greg Goodfried, and Amanda Goodfried. It was independently released on YouTube from June 16, 2006, to August 1, 2008, and was also briefly released on Revver and Myspace. The series revolves around the initially mundane life of homeschooled 16-year-old Bree Avery, who uses the username Lonelygirl15 online. She goes on the run with her friend Daniel after her parents' mysterious religion is revealed to be The Order, a blood-harvesting operation that wants her "trait positive" blood. The series is presented through video blogs, or vlogs, originally recorded solely from Bree's bedroom.