It's not 6 degrees but I though hey, I looked for it, might as well put it up.
Kevin Bacon played in Jack Brennan in Frost/Nixon
The actor who played David Frost was
Michael SheenMichael Sheen played Aro in New Moon
Edward in New Moon is
Robert PattinsonRPattz is Cedric D. in HP and the Goblet of Fire
Warwick Davis played in Filius Flitwick in GOF
In Prince Caspian,
Warwick Davis is Nickabrick