Dionysis Papagiannopoulos (Greek: Διονύσης Παπαγιαννόπουλος; 12 July 1912 – 13 April 1984) was a Greek actor. He was born in Diakopto in the northeastern part of Achaea in 1912. He studied at the Drama School of the National Theatre of Greece (Ethniko Theatro) in Athens and made his stage debut in 1938, appearing as the Knight in William Shakespeare's King Lear. He excelled in Shakespeare's Hamlet as the Grave Digger and in Dimitris Psathas' Fonazei o Kleftis as General Solon Karaleon.