No details were given for Jonny Weston's character, but Suki Waterhouse is playing Marlene, a member of the Dauntless faction.
Divergent stars Shailene Woodley (Tris), Theo James (Four), Kate Winslet (Jeanine), Miles Teller (Peter), Ansel Elgort (Caleb), Maggie Q (Tori), Ben Lamb (Edward), Ray Stevenson (Marcus), Mekhi Phifer (Max) and Zoë Kravitz (Christina) are reprising their roles for the sequel, with Octavia Spencer joining the cast as Johanna.
The story picks up directly after the events of Divergent, with Tris and Four going on the run from Jeanine, the leader of the power-hungry Erudite faction, as they learn the truth about the past which could alter the future.
Jonny Weston most recently starred in John Dies at the End and Under the Bed, and he will next be seen in Project Almanac. Suki Waterhouse will next be seen in Love, Rosie, which hits theaters this October.