Harry Potter and the Deathly Hallows Part 2 (2011)

Though the Harry Potter franchise began in earnest in the early 2000s, its conclusion, Harry Potter and the Deathly Hallows Part 2, came at the start of this decade. For many this spelled the end of an era as we got to see the last adventures of the child actors audiences grew up with. J.K. Rowling's Wizarding World would expand in later years, but this conclusive story to Harry Potter was brilliantly realized on screen.