WALK THE LINE (PG-13) Walk the Line is an engaging, star-studded production that gives us a more or less accurate accounting of Johnny Cash's life, but there's a generic feeling to the movie very much at odds with the edginess of its subject. The movie follows Cash's rise to stardom in the '50s and his subsequent fall, duly noting the marital problems, the drug problems, the inevitable cold turkey turn-around and the eventual comeback. The film is a little too concerned, though, with creating an overly tidy arc out of the events of Cash's life, and there's little here of the epic scope of Ray, no real sense of why Cash was important. Joaquin Phoenix does a serviceable job evoking Cash's physical presence, and Reese Witherspoon's perky Carter is a lot of fun to watch (and fun to listen to; she's a surprisingly strong country singer) — but, frankly, this couple could be almost any pair of innocuously attractive lovebirds. 3 stars