Ron Weasley, Harry Potter, Hermione Granger and Neville Longbottom
In 'Harry Potter and the Deathly Hallows, Part 2,' we finally return to Hogwarts with Harry (Dan Radcliffe), Ron (Rupert Grint) and Hermione (Emma Watson), as they attempt to find and destroy the last horcruxes (bits of You Know Who's soul) necessary to defeat Lord Voldemort once and for all.

Upon arriving at their beloved wizarding school, the Trio reunites with their old schoolmates and friends, who've banded together to reconstitute Dumbledore's Army (the D.A.) in resistance to the new Death Eater–led administration (now led by Headmaster Severus Snape). Here's a Who's Who of the major D.A. members who have a much more significant presence in the final Potter installment than the previous, Trio-centric 'Deathly Hallows, Part 1.' (Mild spoilers ahead.) div>
Neville LongbottomNeville Longbottom
Who He Is: Harry and Ron's painfully shy Gryffindor mate, Neville (played by Matthew Lewis) is a herbology genius who's usually a klutz (he and Hermione were the last to learn how to fly) but has a valiant heart. Neville has fought alongside the Trio at every turn, and we last saw him standing up to a Death Eater on the Hogwarts Express.