Robert Stadlober (born 3 August 1982) is an Austrian actor and musician. His sister is Anja Stadlober, also an actress.

Robert Stadlober was born on 3 August 1982 in Friesach in the Austrian province of Carinthia, and grew up in Puchfeld in the Steiermark (Austria) and in Berlin (Germany). As a child he worked as a voiceover artist for several films and he acted in different TV productions and motion picture films also. His largest success is playing the main role as Benjamin Lebert, a partially disabled teenager at a boarding school, in the film Crazy (2000). Later, he starred in Summer Storm (2004), a gay coming-of-age story set at a rowing summer-camp. Although The Advocate has claimed that he is bisexual, Stadtlober himself objects to such labelling, saying that he's just had some homosexual experiences and that this is normal.