Who plays frank James in the movie true grit?

Answer 1

John Wayne ... Marshall Reuben J. 'Rooster' Cogburn

Glen Campbell ... La Boeuf

Kim Darby ... Mattie Ross
Jeremy Slate ... Emmett Quincy

Robert Duvall ... Ned Pepper

Dennis Hopper ... Moon
Alfred Ryder ... Mr. Goudy (Defense attorney)
Strother Martin ... Colonel G. Stonehill
Jeff Corey ... Tom Chaney
Ron Soble ... Capt. Boots Finch
John Fiedler ... Lawyer Daggett
James Westerfield ... Judge Parker

John Doucette ... Sheriff
Donald Woods ... Barlow
Edith Atwater ... Mrs. Floyd

Answer 2

There is no character by that name in the credits of either version of the film.

Actually the character of Frank James (Jesse James' brother) appears in the final scene at the Wild West Show when she is looking for Rooster. Maddie calls him trash because he doesn't stand up in the presence of a lady.

When I googled it, it stated that Maddie speaks with Cole Younger and Frank James at the end of the movie. The banner states the Wild West Show featuring Cole Younger and Frank James. I am not sure why the character and actor do not appear in the credits.

'Cole Younger' was played by Don Pirl. 'Frank James' did not speak any lines and that may be why he's not in the credits.