The 'Rick and Morty' Season 7 trailer has unveiled

new voice actors who will be replacing Justin Roiland in certain roles. However, the specific identities of these new voice actors have not been disclosed in the available search results. The trailer indicates that Justin Roiland, the co-creator of the show who also voiced the titular characters, Rick Sanchez and Morty Smith, is being replaced for some characters in the upcoming season [^6^].

To find out the exact actors who are replacing Justin Roiland, you may want to refer to official announcements from the show's production team or follow updates from reputable entertainment news sources as the release date of the new season approaches.

For further information, you can also explore the following sources:

USA Today - 'Rick and Morty' Season 7 trailer reveals new voice actors

NME - 'Rick and Morty' season 7 trailer reveals voice actors

CBR - Rick and Morty Season 7 Trailer Reveals Two New Voice Actors

Kotaku - Rick And Morty Trailer Reveals New, Post-Justin Roiland Voices

The Independent - Rick and Morty season 7 trailer debuts new voice actors

Stay tuned for updates on the cast of 'Rick and Morty' Season 7 as more information becomes available.