Luisa Ranieri (born 16 December 1973) is an Italian actress.

[1] She made her breakthrough in Leonardo Pieraccioni's The Prince and the Pirate (2001) before starring in a variety of Rai crime and biographical miniseries.

Ranieri is best known for her television movie portrayal of the opera diva Maria Callas in the 2005 Italian television film Callas e Onassis, which began her acting career.

[2] Though a number of fiction and nonfiction movies, and documentaries, have been done on the late shipping magnate billionaire Aristotle Onassis, and of Callas, the TV movie Callas e Onassis is the only television or movie depiction ever made exclusively devoted to the public and private deep emotional relationship and close friendship between Onassis and Callas.

Ranieri had a noteworthy acting performance in the 2010 drama film Letters to Juliet as one of Juliet's secretaries, who is the closest to Sophie, played by Amanda Seyfried.