After watching Tinker Tailor Soldier Spy I was wondering which other movie has a number (at least three, because 2 would be a very long list) of JA actors in it and came up with this list.

Possession: Elizabeth Bennet, Emma, Mr. Knightley
I put this on top of the list because it has these 3 principal characters playing the major roles in this movie.

Tinker Tailor Soldier Spy: Darcy, Mr Knightley, Captain Wentworth

Harry Potter: Brandon, Mr Woodhouse, Elinor, Mrs Palmer, Sir John Middleton, Sir John Middleton (again)

Love Actually: Edward, Elinor, Brandon, Darcy, Elizabeth Bennet

Peter’s Friends: Elinor, Mr and Mrs Palmer

A couple of interesting pairings:

Darcy-Lizzie of P&P2 in The King’s Speech, but alas not opposite each other.
Mr and Mrs Palmer of S&S2 as husband and wife in “Peter’s Friends”