Awkwafina, who voices Courtney in the film, had also starred in the film Crazy Rich Asians (2018). One of the eagle guards in this film is shown reading a book titled, "Crazy Rich Avians".
An early draft of this movie had a plot where the eagles come to destroy Piggy Island but was scrapped due to its serious tone.
Leslie Jones and Peter Dinklage "rekindle their romance" that began with a sketch on Peter Dinklage/Gwen Stefani (2016).
Released the same year as The Secret Life of Pets 2 (2019), similar to how the first Angry Birds (2016) released the same year as The Secret Life of Pets (2016).