Without a doubt, one of the best characters in the LotR, both movies and books.

Arise now, arise, Riders of Theoden!
Dire deeds awake, dark is it eastward.
Let horse be bridled, horn be sounded!
Forth Eorlingas!

Arise, arise, Riders of Theoden!
Fell deeds awake: fire and slaughter!
Spear shall be shaken, shield be splintered,
A sword-day, a red day, ere the sun rises!