Spray the insert of the crockpot with nonstick cooking spray. Add the chicken, parmesan garlic sauce, parmesan cheese, and cream cheese into the crockpot.
Fill the empty parmesan garlic sauce bottle with the milk and shake it really good to get the remaining sauce out of it. Pour this over the chicken and other ingredients in the crockpot.
Meanwhile, cook pasta according to package directions. Stir the cooked pasta into the parmesan chicken mixture inside the crockpot until well combined.