Arvo Vallikivi (December 14, 1935 – July 26, 2024), commonly known under the pen name of Arvo Valton, was an Estonian writer known for a number of books and, among other things, the script for Viimne reliikvia, the highly successful film adaptation of Eduard Bornhöhe's Vürst Gabriel ehk Pirita kloostri viimsed päevad.