According to an interview he gave to IGN.com, Michael Shanks announced that the first of two Stargate SG-1 films will begin filming April 15, 2007, while the second will start shooting June 1.
The first movie will follow the current 10th season Ori storyline, and the second one will involve time travel.
The entire cast is signed up for both movies.
Movie 1 will be executive produced and written by Robert C. Cooper (who will also direct it), while the second movie will be executive produced by Brad Wright and directed by Martin Wood.
Head on over to IGN.com to check out more details and read the full interview with Michael Shanks.