You can watch "The Kid Who Would Be King" on various streaming platforms, including Amazon Prime Video, Google Play Movies, and Vudu, where you can rent or purchase the film. Additionally, it may be available on subscription services like Hulu or Disney+, depending on your region. Check local listings or your preferred service for availability.

"The Kid Who Would Be King" is a 2019 fantasy-adventure film directed by Joe Cornish. The story follows a modern-day boy named Alex who discovers King Arthur's legendary sword, Excalibur, in a construction site. He soon learns he is destined to unite his classmates to defeat the ancient sorceress Morgana, who threatens the world. With the help of his friends, including a nerdy boy and a rival, Alex embarks on a quest filled with magic and challenges, ultimately learning about friendship, bravery, and leadership.

"The Kid Who Would Be King" was primarily filmed in the United Kingdom, with many scenes shot in and around London. Key filming locations included the historic sites of the British countryside and various studios, which helped create the film's magical and adventurous atmosphere. The production utilized both urban and natural landscapes to capture the essence of the story, which revolves around a modern-day Arthurian adventure.

As of my last update, "The Kid Who Would Be King" was available for streaming on platforms like Amazon Prime Video, but availability may vary by region and over time. To confirm if it's currently on Prime, it's best to check the Amazon Prime Video catalog directly or use the search function on the platform.