The Oscar-nominated Hurt Locker and The Town star has disclosed the name of his secret agent, who will step into the shoes of Matt Damon's Jason Bourne.
"My character is called Aaron Cross, but he ends up having a bunch of different names," Renner told Empire.
The actor reassured fans that The Bourne Legacy will deliver the same action-packed thrills as the previous movies in the series, but on a larger scale.
"For fans of the franchise, it has that same ticking clock, but it's a new programme and new characters.
"It's that same deal [with Treadstone], it's just a new set of agents with a different leash. It's the same tempo and pace but more expansive and bigger. The differences are pretty vast but you'll know it's a Bourne movie."
Edward Norton, Oscar Isaac, Rachel Weisz, Joan Allen and Albert Finney will co-star in The Bourne Legacy, which opens in cinemas in August 2012.
Watch Matt Damon and Paddy Considine in the Waterloo station sequence from The Bourne Ultimatum below: