Actor Matthew McConaughey allegedly lost out on the role of Jack Dawson in `Titanic` because he wouldn`t let go of his Southern accent, according to a memoir written by the film`s producer, Jon Landau, reported People.

McConaughey`s accent did not resonate with the film`s director, James Cameron, who told the actor, "That`s great, now let`s try it a different way," according to Landau`s book.

But McConaughey felt otherwise, telling Cameron, "No. That was pretty good. Thanks," writes the producer.