When does Unikitty! return?

Unikitty! (stylized as UniKitty!) is an American animated television series. The series stars the character of the same name from The Lego Movie franchise. It was announced on May 10, 2017 that the series would premiere on Cartoon Network on January 1, 2018. The second season of the series premiered on February 4, 2019, while the third and final season premiered on December 24, 2019.
As the ruler of the Unikingdom, Princess Unikitty has various misadventures in her land with her brother Prince Puppycorn, scientist Dr. Fox, bodyguard Hawkodile and advisor Richard. They also deal with the threats of Master Frown from the neighboring Frown Town.