Preheat oven to 450F. On a floured surface, roll out pizza crust to about 12 inches. I like to fold over the edge of the crust all the way around so it looks more like restaurant pizza, but you don't have to. Transfer pizza to a parchment-paper-lined baking sheet or pizza stone.
Spread sauce over the dough, leaving the edges of the dough plain. Layer the cheeses next (be sure to put a little cheese on the plain edges--it will bake in and be delicious!) Sprinkle ranch seasoning over the entire pizza, including the edges. Follow the seasoning with cilantro, red onion (I like a lot), chicken, and sweet pickles.
Bake for 15-17 minutes, or until the bottom of the crust is golden brown. Slice and serve!