Tony Gilroy hired for 'Bourne Legacy'

Tony Gilroy has been hired to write the script for The Bourne Legacy, Universal Pictures has announced.

Gilroy, who worked on The Bourne Identity, The Bourne Supremacy and The Bourne Ultimatum, has also been enlisted to pen a "franchise bible" to guide future sequels.

Gilroy also wrote and directed the George Clooney thriller Michael Clayton and last year's Duplicity.

Legacy will not be based on the Eric Lustabader-penned novel in Robert Ludlum's Bourne series.

Star Matt Damon has previously said that he won't return to the role without director Paul Greengrass, who has ruled out making further instalments in the spy franchise.