The pair have both re-signed with the Swans until the end of the 2020 season.
Papley, 21, has played 40 matches with the Swans, while Hewett, also 21, has managed 48 games in the past two seasons since making his debut.
“Tom’s development during his two seasons with the Swans has been significant,” Swans head of football Tom Harley said.
“He came to us via the Rookie Draft to service a specific need and impacted immediately.
“We love his natural competitive drive and see him playing a large role in the future.
“The fact that George didn’t debut until his third year with the Swans is a credit to his character and resilience.
“He is an extremely trusted and respected member of the playing group.”