Cyrus Arnold is an American actor and voice actor. He has acted in numerous productions, with some of his most notable being playing BJ Malloy in Nickelodeon's Sam & Cat, Derek Zoolander, Jr. in Zoolander 2, David "Truck" Johnson III in the second season of Fox's The Exorcist, Borgie in Runt, Kip Quade in Run Hide Fight, Josh Jagorski in 8-Bit Christmas, Kenny Yankovich in Mr. Harrigan's Phone, and Hunter Drew in Family Switch. He has also acted in Comedy Bang! Bang!, About a Boy, Gotham, Richie Rich, Hardcore Henry, Middle School: The Worst Years of My Life, Bones, Fresh Off the Boat, and Veronica Mars. Additionally, he voices Jawbreaker Malto in Transformers: EarthSpark.
For Disney, he voiced Colton as a human in the Goldie & Bear episode "Horsin' Around" and a teen driver in Diary of a Wimpy Kid. He also played Trevor Larkin in the Just Beyond episode "Standing Up for Yourself" and Atticus in the Fox sitcom Outmatched (which aired after Disney's acquisition of Fox in 2019). He appeared as Brian Morgan/Chunk in the unaired pilot of an unmade ABC TV show Chunk & Bean.
He was supposed to have a role in the Disney Channel sitcom I Didn't Do It, but for unknown reasons, he never did.