Finally, we have a Four!!

The face of our Four:
Theo James (from Underworld: Awakening) is cast as 'Four' for the Divergent movie coming out in March 2014.

Theo James tells EntertainmentWeekly
“As a fan of Divergent, I am thrilled to have been chosen for the role of Four and to be a part of such a phenomenal story. As an actor, I am excited to explore and play this incredibly complex and mysterious character. Director Neil Berger is a remarkably visionary filmmaker. Along with the incredibly talented Shailene Woodley, we are looking forward to the fantastic adventure of bringing this beloved book to life on the big screen for all the fans.”
Rob Friedman and Patrick Wachsberger (Co-chairmen of Lionsgate Motion Picture Group) says
“Theo is not only an incredibly talented actor, he is also who we envisioned as Four when reading Veronica’s novel which has taken the world by storm. As we continue to develop the film, the studio remains committed to providing fans with a movie adaptation that stays as true to the book as possible and we are confident that we have done so with our selection of Shailene and Theo in the leading roles. We took our time to find the right actor to fill the role of Four, and Theo is definitely the perfect fit. Veronica has crafted a truly iconic character in Four and we cannot wait to begin production and bring him and this story to life for millions of fans around the world."
In case you missed it, Caleb, Tori, Christina, and Eric have also been officially casted.