Shailene Woodley as Beatrice

Beatrice Prior (Shailene Woodley) was born into an Abnegation (the group that values selflessness) family, but she chooses to join the Dauntless faction (the group that values bravery). She learns that she's Divergent (meaning she doesn't fit into just one faction) and must keep this information secret, as the leaders of the futuristic society view it as a threat.