Mylène Jampanoï (French pronunciation: ​[milɛn ʒɑ̃panɔj]; born Lena Jam-Panoï on 12 July 1980) is a French actress, model, and visual artist. Her first leading role was in the drama film The Chinese Botanist's Daughters (2006). She subsequently garnered international attention for her role in Pascal Laugier's controversial horror film Martyrs (2008).

She later had a supporting role in Clint Eastwood's Hereafter (2010), and starred as Bambou in the Serge Gainsbourg biopic, Gainsbourg: A Heroic Life (also 2010). Other film credits include the American animated film Kung Fu Panda (2008), the Canadian drama Laurence Anyways (2012), and the Netflix-produced Madame Claude (2021).