The Kid Who Would Be King (2018) online

Old school magic meets the modern world in this epic adventure. Alex (Louis Ashbourne Serkis) thinks he's just another nobody, until he stumbles upon the mythical sword in the stone, Excalibur. Now, he must unite his friends and enemies into a band of knights and, together with the legendary wizard Merlin (Sir Patrick Stewart), take on the wicked enchantress Morgana (Rebecca Ferguson). With the future at stake, Alex must become the great leader he never dreamed he could be.