Sonic the Hedgehog 3[b] is a 2024 action-adventure comedy film based on the Sonic video game series. The third in the Sonic film series, it was directed by Jeff Fowler and written by Pat Casey, Josh Miller, and John Whittington. Jim Carrey, Ben Schwartz, Natasha Rothwell, Shemar Moore, James Marsden, Tika Sumpter, and Idris Elba reprise their roles, with Krysten Ritter and Keanu Reeves joining the cast. In the film, Sonic, Tails, and Knuckles face Shadow the Hedgehog, who allies with the mad scientists Ivo and Gerald Robotnik to pursue revenge against humanity.