Filming on Ant-Man began today in San Francisco, CA, and will later head to Atlanta, GA, which will serve as the base for the film’s production, according to Marvel, who announced the news this morning.

Last week, we reported on a rumor that some of the cameos we would see in Ant-Man would have some pretty big connections. Stark seems to be at the center of those connections, with Peggy Carter, Howard Stark, and Arnim Zola also being involved. Based on that, we can speculate that Hank Pym would be a member of the group that helped create S.H.I.E.L.D.

Marvel’s announcement today confirms that cast has grown quite a bit. Judy Greer, T.I., Bobby Cannavale, and John Slattery have all joined the film. We can also confirm that Michael Pena is going to be in Ant-Man. Hit the jump for more.