Alois Philipp Maria, Hereditary Prince of Liechtenstein, Count Rietberg (born 11 June 1968), is the eldest son of Hans Adam II, Prince of Liechtenstein, and Countess Marie Aglaë Kinsky of Wchinitz and Tettau. Alois has been regent of Liechtenstein ("") since 15 August 2004. He is married to Duchess Sophie of Bavaria.