In North America, it peaked at number twenty-six on the US Billboard 200 and was certified gold by the RIAA for shipments of over 500,000 copies in the United States.

"[1] David Hooper from the BBC gave the album another positive review, writing "there's no denying this is a finely-crafted number with bold, voluptuous harmonies.

Further, Hollow stated "Unwritten is a textbook quality pop album, lifted by Natasha's strong voice, immaculate production and some absolutely corking singles.

Welsh continued to add that Unwritten was "both musically note-worthy and lyrically substantial", concluding that there was "no shame in adding this to your collection.

It sold over one million copies in the United Kingdom, being certified triple platinum by the British Phonographic Industry (BPI).