There is currently no officially announced or confirmed voice actor for Rosalina in a Super Mario Galaxy movie as of early 2026. Any specific name you see online right now is fan casting, speculation, or wishful thinking rather than confirmed news.

Status right now

  • Nintendo, Illumination, and Universal have not publicly revealed a cast list for Rosalina in a Mario Galaxy–themed film.
  • Articles and videos discussing “who will voice Rosalina” clearly frame their picks as predictions, fan choices, or dream casting, not leaks or studio announcements.
  • Entertainment and voice-actor news sites describe fans as “awaiting Nintendo’s choice” for Rosalina’s voice, which shows that the role has not been officially assigned (or at least not publicly shared).

What people are speculating

A lot of the buzz you’ll see if you search “who is voicing Rosalina in Mario Galaxy movie” is fan debate and casting pitches:

  • Forum posts and Reddit threads throw around names like Emma Stone or Cate Blanchett as “ideal” choices, but they are just opinions.
  • Entertainment outlets and blogs run “who should voice Rosalina” pieces that list multiple actresses (for example Scarlett Johansson, Anne Hathaway, Ariana Grande, and others) as possibilities, again framed as wish lists rather than reports.
  • YouTube creators build whole videos around shortlists of potential Rosalina actors, often explicitly stating the casting is not confirmed and is purely speculative.

How to tell when it’s actually confirmed

If you want to be sure when Rosalina’s actor is truly locked in:

  1. Look for an official press release or announcement from:
    • Nintendo
    • Illumination
    • Universal Pictures
      These will usually be covered by major trade outlets like Variety, The Hollywood Reporter, or Deadline, not just fan blogs.
  1. Be cautious with:
    • Thumbnails or titles that say “confirmed” but in the video admit it is just theory or “dream casting”.
 * Articles that only list possibilities without citing a studio source or a reputable industry reporter.
  1. When it is announced, you can expect:
    • Inclusion of Rosalina’s actor in official cast lists and trailers.
    • Coverage by larger mainstream and gaming news outlets, not just forums or YouTube channels.

Short answer for your post

If you’re writing that “Quick Scoop” post and want to stay accurate and not mislead readers, you can safely say something like:

As of now, there is no official confirmation of who is voicing Rosalina in a Super Mario Galaxy movie. Fans and commentators are actively fan- casting various actresses, but studios have not publicly announced a voice actor yet.

Bottom note (as requested):
Information gathered from public forums or data available on the internet and portrayed here.