William S. Heckscher
From 1918 to 1921, the family lived in the Netherlands while Heckscher's father served as the Weimar Republic's ambassador to The Hague; there, Heckscher enrolled at the Nederlandsch Lyceum. Heckscher pursued his interests in history and Flemish art by spending his off hours studying at the Dutch Royal Library, the Mauritshuis and the Kröller-Müller Museum, but was dismissed from the Lyceum in 1920 for "lack of scholarly potential". After the family returned to Hamburg, Heckscher attended the city's Kunstgewerbeschule, now the Hochschule für bildende Künste Hamburg, but failed a class in ceramics.
Billy Joel
Joel attended Hicksville High School until 1967, but he did not graduate with his class. He had been playing at a piano bar to help his mother make ends meet, which interfered with his attendance; specifically, he missed a crucial English exam, after playing a late-night gig at a piano bar the evening before. Although Joel was a comparatively strong student, at the end of his senior year he did not have enough credits to graduate. Rather than attend summer school to earn his diploma, Joel decided to begin a career in music: "I told them, 'To hell with it. If I'm not going to Columbia University, I'm going to Columbia Records, and you don't need a high school diploma over there'." Joel did eventually sign with Columbia. In 1992, he submitted essays to the school board and was awarded his diploma at Hicksville High's annual graduation ceremony, 25 years after leaving.