Melanie Merkosky (born April 7, 1986) is a Canadian actress, perhaps best known for her work portraying the main character Jennie in the Internet series lonelygirl15.Merkosky has had parts on Runaway, Slings and Arrows, and American Pie Presents The Naked Mile. In 2009, she starred as Robin Matthews on the web seriesHarper's Globe, which was an online companion to TV series Harper's Island.