Simon Petrikov

The former Ice King, on multiversal adventures with Fionna and Cake.

In Adventure Time: Fionna and Cake, Tom Kenny returns to voice Simon Petrikov, the alternate-universe counterpart to the Ice King. This version serves as a central figure alongside the gender-swapped protagonists, Fionna Campbell and Cake the Cat. The series, which debuted on August 31, 2023, follows their multiversal adventures through worlds without magic.

Quick Facts

Voice actor: Tom Kenny

Lore & Background

Simon Petrikov appears in the spin-off series alongside Fionna Campbell and Cake the Cat. The story centers on these three as they traverse various universes, distinct from the magic-filled land of Ooo. In this universe, Simon is not defined by the Ice King persona or a cursed crown but acts as a supportive figure to Fionna. The narrative highlights his role in Season 1, where he accompanies Fionna and Cake on their multiversal journey.

Reader's Guide

Simon Petrikov is a key character in Adventure Time: Fionna and Cake, voiced by Tom Kenny. He joins Fionna Campbell and Cake the Cat on multiversal adventures starting in Season 1 (2023). The series was developed by Adam Muto for HBO Max and premiered on August 31, 2023. Simon’s role is pivotal as he interacts with characters like Prismo, voiced initially by Sean Rohani and later by Kumail Nanjiani in Season 2 (premiered October 23, 2025). The show explores themes of community and identity in a magic-less universe. Fans can expect Simon to appear alongside other original series voice actors, including Madeleine Martin as Fionna and Roz Ryan as Cake. For viewers interested in the deeper lore, Season 2 introduces new dynamics with Huntress Wizard, expanding the scope of their inter-dimensional travels.