Liza del Sierra^[2] (also spelled Del Sierra, born 30 August 1985) is a French pornographic actress, film director and producer.

Del Sierra was born Émilie Delaunay in Pontoise, in the Parisian region. She later grew up mostly in Bordeaux.^[3] After working as a stripper, she shot her first pornographic film in 2005,^[4] with her husband's approval. They later divorced, they both surrendered.^[5]

After making several films in France, she worked for a time in Hungary's porn industry. She also stated in a 2012 interview that she had escorted for some time when she wasn't getting enough film offers.^[6]

In 2009, she received a career achievement award at the Brussels International Festival of Eroticism.^[7] In 2010, she appeared in one episode of the series Du hard ou du cochon !, the French remake of PG Porn, broadcast on Canal+.^[8] After shooting a gonzo in France with Manuel Ferrara, she went to work in the United States, where she received several AVN Awards nominations.^[9] On July 11, 2011, Complex ranked her eightieth on their list of "The Top 100 Hottest Porn Stars (Right Now)".^[10] Her American career helped her to achieve more fame in her home country,^[6] where she became familiar to the general public in the early 2010s.^[11] After returning to France, she started directing and producing.^[12] In 2014, the production of one of her films as a director was the subject of a documentary about the porn industry, broadcast on France 2.^[11]