EXCLUSIVE “Captain America” star Sebastian Stan and Australian thesp Socratis Otto have joined Summit Entertainment’s thriller “Gone.” Amanda Seyfried stars alongside Jennifer Carpenter, Wes Bentley and Emily Wickersham.

Lakeshore Entertainment and Sidney Kimmel Entertainment are teaming to produce. Stan, who appeared in “Black Swan,” will soon be seen as superhero sidekick Bucky Barnes in “Captain America: The First Avenger.”

Otto starred in Aussie TV series “Home and Away,” which launched the careers of Chris Hemsworth, Isla Fisher and Ryan Kwanten. Stan is repped by CAA and Brookside Artist Management; Otto by Thruline Entertainment and El Erdmane at RGM Artist Group.