Why is it der Thriller?

Thriller ends in -er, and most nouns ending in -er are masculine: in a German dictionary, 86% of them take der.

All nouns ending in -er
Sense 1
der

Meaning

[1] A book, film or play that is characterized by special excitement and thrills

[1] ein Buch, Film oder Theaterstück, das sich durch besondere Spannung und Nervenkitzel auszeichnet

Examples

[1] Alfred Hitchcock's film "The Birds" has the qualities of a Thrillersä

[1] Alfred Hitchcocks Film „Die Vögel“ hat die Qualitäten eines Thrillers.

Declension

1 Singular Plural
Nominativ der Thriller die Thriller
Genitiv des Thrillers der Thriller
Dativ dem Thriller den Thrillern
Akkusativ den Thriller die Thriller

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary