Into the Unknown: Making Frozen II is a 2020 documentary series about Disney's animated film Frozen II, which premiered in November 2019. Its six episodes follow the production crew and voice actors of Frozen II in the film's final year of development. This includes the story development and reworking of the song "Show Yourself", the variety of different roles in the animation process, the songwriting and orchestral arrangements, and the post-production process. It was directed by Megan Harding, who was previously involved with a 2014 documentary on the making of the 2013 film Frozen, and released on the streaming service Disney+.

The documentary was produced by Lincoln Square Productions. Harding aimed to represent the production process honestly and the crew filmed for 115 days. They frequently flew between New York City, where they worked, and Los Angeles, where Frozen II was produced at Walt Disney Animation Studios, with some additional filming at the homes of individual crew members. The series received positive critical reception.