If you've been online this week, you've probably seen the image: director Jeff Fowler standing on a green-screened set, clapperboard in one hand and Amy Rose's oversized Piko Piko Hammer in the other. It is, as first-day-of-production announcements go, a pretty effective one. #SonicMovie4 is officially filming, and the Sonic Cinematic Universe is showing no signs of slowing down.
Fowler posted the image to X on 2 March, confirming the fourth instalment in the Paramount franchise has entered production ahead of its scheduled release on 19 March 2027. The hammer he's holding is not just a prop for the photo: it signals the arrival of Amy Rose as a full cast member after she appeared, silently, in the mid-credits scene of Sonic the Hedgehog 3 at the end of 2024.
Voicing Amy is Kristen Bell, whose casting was confirmed about two weeks before the production announcement, as reported by IGN. Bell brings serious pedigree to the role. She is perhaps best recognised as the voice of Anna across the Frozen franchise, though fans of The Good Place, Veronica Mars, and Nobody Wants This will know her just as well from live-action television. Gamers may also remember her as Lucy Stillman in the first three Assassin's Creed titles. Importantly, she and Sonic's voice actor Ben Schwartz are not strangers: the two appeared together on all five seasons of House of Lies, which should make for a natural on-screen chemistry.
The broader cast reads like a who's who of the franchise at this point. Bell joins series stalwarts Ben Schwartz, who voices Sonic; Idris Elba, who voices Knuckles; and Keanu Reeves, who voices Shadow as of Sonic 3. Colleen O'Shaughnessey, who has voiced Tails in the video games for years, also reprises her role. One open question is Jim Carrey's return as Dr. Robotnik. Carrey has expressed an openness to coming back for Sonic the Hedgehog 4, citing a desire for an interesting premise and script to entice him.
The franchise has earned the confidence Paramount is placing in it. Together, the Sonic films have surpassed $1 billion at the global box office, with the latest instalment becoming the highest-grossing film in the series, earning over $490 million. Sonic the Hedgehog 3 debuted at number one in over 30 markets, including Australia. Those numbers explain why Paramount has confirmed a 2027 release date as well as a separate 2028 Sonic universe film.
As for what the story might look like, the breadcrumbs are there for fans willing to read them. The post-credits scene in Sonic the Hedgehog 3 teased the introduction of both Metal Sonic and Amy Rose, with speculation that the film will draw from Sonic the Hedgehog CD, the 1993 game known for its use of time travel and for establishing that a future version of Robotnik created Metal Sonic. Writer Pat Casey has previously said the team had a deliberate plan to make Amy work as a film character in her own right, rather than crowd her into an already busy entry.
Here's what nobody's talking about: the casting of Metal Sonic. Unlike the other characters introduced so far, Metal Sonic is notoriously mute across most of his video game appearances, which raises a genuine creative question about how the film will handle him. Will he get a voice? Will the silence be part of his menace? It is one of the more intriguing decisions the filmmakers will have to make.
For Australian fans, the wait until March 2027 is the catch, but the franchise's track record of simultaneous global releases suggests there will be no meaningful delay this time around. Based on prior films' production schedules, the live-action filming component has generally taken around three to four months, which would see Sonic 4 wrap its on-set shooting around early August 2026. After that, it's over to the animation and VFX teams to bring the Blue Blur back to life.