See Tom Hanks, John Mayer in 'California Typewriter' Documentary Trailer

"The typewriter doesn't judge you. It just goes, 'Right away sir,'" singer says in documentary trailer

Tom Hanks and John Mayer discuss their love of typewriters in the first trailer for the documentary 'California Typewriter.'

Tom Hanks and John Mayer discuss their love of typewriters in the first trailer for California Typewriter, a documentary about the antiquated dictation machine.

"The typewriter doesn't judge you. It just goes, 'Right away sir,'" Mayer says in the trailer. "'However you want it to be.'"

Hanks, who launched a free typewriter app for smartphones, is the owner of more than 250 different typewriters, 90 percent of which are in working order.

California Typewriter also features testimonials from historian David McCullough and playwright Sam Shepard about why the typewriter is still their go-to writing device. The film also focuses on the typewriter repairmen and artists creating artwork out of typewriter parts.

California Typewriter will hit select theaters on August 18th, with a iTunes release set for October.