Thomas Parke D'Invilliers was a pen name of which American writer?

Francis Scott Key Fitzgerald (September 24, 1896 – December 21, 1940) was an American fiction writer, whose works helped to illustrate the flamboyance and excess of the Jazz Age.

Thomas Parke D'Invilliers is both a pen name of Francis Scott Fitzgerald and a character in his quasi-autobiographical first novel, "This Side Of Paradise". In the novel, which is more or less a roman à clef, D'Invilliers represents the poet John Peale Bishop, a friend of Fitzgerald's at Princeton and a member of the 1917 class.

The epigraph for Fitzgerald's "The Great Gatsby" features a poem ostensibly by D'Invilliers called "Then Wear the Gold Hat".