Princess Laetitia Maria of Belgium, Archduchess of Austria-Este (Laetitia Maria Nora Anna Joachim Zita, born 23 April 2003) is the third daughter and youngest child of Lorenz, Archduke of Austria-Este and Princess Astrid of Belgium. She was born at the Clinique Saint Jean, Brussels, Belgium  and is currently Ninth in line to the Belgian throne.

Princess Laetitia was a flower girl at the 2014 wedding of her brother Prince Amedeo of Belgium, Archduke of Austria-Este and Elisabetta Rosboch Von Wolkenstein.