Eddie Jones and his squad have returned to The Lensbury in Teddington after winning the Guinness Six Nations with win over Italy last weekend.
They begin training this week for their opening Quilter International against Georgia at Twickenham next Saturday.
That will be followed by games against Ireland, Wales and a final Quilter International at Twickenham on December 6.
Leicester Tigers scrum-half Youngs won his 100th cap in the win over Italy, with Genge making his 19th Test appearance in Rome.
Elliot Daly and Joe Marler return after injuries, while Alex Mitchell has also joined up with the squad.
Jack Singleton (hamstring) and Anthony Watson (ankle) have withdrawn from the squad for the Georgia fixture through injury and will begin rehabilitation with their clubs.
Tigers fly-half George Ford and Mark Wilson will continue their rehabilitation programmes in camp while Billy Vunipola will join up with the squad on Sunday after the birth of his son this week.
Newly-appointed skills coach, Jason Ryles, has joined up with the team after finishing the season and winning the NRL Grand Final with Melbourne Storm.
Joe Cokanasiga (Bath Rugby, 9 caps)
Elliot Daly (Saracens, 43 caps)
Owen Farrell (Saracens, 84 caps)
George Furbank (Northampton Saints, 3 caps)
Jonathan Joseph (Bath Rugby, 51 caps)
Ollie Lawrence (Worcester Warriors, 1 cap)
Max Malins (Bristol Bears, uncapped)
Joe Marchant (Harlequins, 3 caps)
Jonny May (Gloucester Rugby, 57 caps)
Alex Mitchell (Northampton Saints, uncapped)
Dan Robson (Wasps, 3 caps)
Henry Slade (Exeter Chiefs, 30 caps)
Ollie Thorley (Gloucester Rugby, 1 cap)
Jacob Umaga (Wasps, uncapped)
Ben Youngs (Leicester Tigers, 100 caps)
Tom Curry (Sale Sharks, 24 caps)
Tom Dunn (Bath Rugby, 1 cap)
Ben Earl (Bristol Bears, 4 caps)
Charlie Ewels (Bath Rugby, 16 caps)
Ellis Genge (Leicester Tigers, 19 caps)
Jamie George (Saracens, 50 caps)
Jonny Hill (Exeter Chiefs, 1 cap)
Ted Hill (Worcester Warriors, 1 cap)
Maro Itoje (Saracens, 39 caps)
Joe Launchbury (Wasps, 65 caps)
Lewis Ludlam (Northampton Saints, 8 caps)
Joe Marler (Harlequins, 71 caps)
Beno Obano (Bath Rugby, uncapped)
David Ribbans (Northampton Saints, uncapped)
Kyle Sinckler (Bristol Bears, 36 caps)
Will Stuart (Bath Rugby, 4 caps)
Sam Underhill (Bath Rugby, 19 caps)
Billy Vunipola (Saracens, 52 caps)
Mako Vunipola (Saracens, 60 caps)
Harry Williams (Exeter Chiefs, 18 caps)
Jack Willis (Wasps, uncapped)