Baby Shark's Big Show! (Korean: 아기상어: 올리와 윌리엄) is an animated children's television series based on the "Baby Shark" brand from the South Korean company Pinkfong. SmartStudy, Pinkfong's parent company, co-produces the show with Nickelodeon Animation Studio from the United States.In South Korea, Baby Shark's Big Show! debuted on the Educational Broadcasting System (EBS) with a Christmas special on December 25, 2020. From September 2021 onward, the series airs regularly on EBS1 on Wednesdays and Thursdays. In the United States, it premiered on Nickelodeon on December 11, 2020.