Danny DeVito touted as Wario by Super Mario Galaxy star Charlie Day

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As Nintendo’s film universe grows with the recently released Super Mario Galaxy sequel, one familiar face from the Mario cast is publicly backing a surprising addition: Charlie Day, who returns as Luigi in the new movie, has nominated long-time colleague Danny DeVito to play Mario’s rival. The suggestion is more than a fan’s wish — it highlights how star casting could shape the franchise’s next installments and keep audience attention between releases.

Day made the endorsement during an interview with ScreenRant, saying he believed DeVito would bring the right energy to the role of Wario. The comment adds fuel to an active fan movement that has repeatedly floated DeVito as a top choice for Mario’s antagonist.

Why the idea is gaining traction

Day and DeVito have a long professional history: DeVito joined the cast of It’s Always Sunny in Philadelphia early in the series’ run, and the pair have shared the screen for nearly two decades. That existing rapport gives the suggestion a sense of plausibility beyond casual fan chatter.

DeVito himself has signaled openness to varied projects. In a May 2024 interview with The Movie Dweeb he said he’s open to opportunities, indicating he would consider roles that interest him — though he stopped short of committing to any specific part.

How casting choices could affect the franchise

Casting a high-profile, unconventional actor like DeVito as Wario would do more than provide a recognizable voice: it would influence marketing, tone and cross-demographic appeal. Industry observers note that familiar names can draw attention from viewers who might not otherwise tune into an animated sequel.

Star power: A well-known actor can amplify media coverage and broaden the audience beyond core fans.

Character chemistry: Pre-existing relationships among actors can translate into richer vocal interplay in animation.

Creative fit: Wario’s comic antagonism could suit DeVito’s established screen persona, but the match depends on direction and script.

Logistics: Scheduling, compensation and creative control remain practical hurdles for any cross-franchise casting.

Other names in the mix

The conversation around Wario’s casting predates Day’s recent comment. When the original Super Mario Bros. film premiered in 2023, Bowser voice actor Jack Black had pointed to Pedro Pascal as a potential fit for the role. Such public suggestions reflect a broader tendency — actors and fans alike propose options that could reshape future installments.

For now, no official casting announcement has been made for Wario in upcoming projects. Studio decisions typically balance creative intent, contractual realities and marketing strategy, so vocal endorsements — even from co-stars — are one part of a larger process.

What to watch next

If the franchise follows typical sequel cycles, additional characters and casting updates could surface over the next year as studios plan release schedules and promotional campaigns. Fans and industry watchers will likely monitor:

Statements from the film’s producers and casting directors

Official casting calls or credits for future Mario films or spin-offs

Public comments from proposed actors, including DeVito, Day and other franchise regulars

Whether Danny DeVito ultimately becomes the face — or the voice — of Wario remains uncertain, but Day’s public endorsement underscores how casting choices continue to be a focal point for audience interest as Nintendo expands its on-screen universe.