You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Q: Category: A WALK ACROSS THE CHARLES BRIDGE 
Clue: Originally called Stone Bridge, the Charles Bridge was built with this "stone", like the walls of the White House

A: sandstone
****
Q: Category: JUILLIARD ALUMNI 
Clue: Not averse to portraying icons, this alum has played Jim Morrison, Elvis Presley & Batman on film

A: val kilmer
****
Q: Category: LEAN SCREEN 
Clue: Early Lean films included adaptations of this man's plays "Brief Encounter" & "Blithe Spirit"

A:
noel coward
****