The Sims Studio has announced that The Sims 4 free October update is live now. It contains ghosts, Star Wars costumes for your Halloween celebrations and some minor bug fixes.
"Your dead Sims can now rejoin the world of the living, where they maintain all the attributes they had a as a Sim, but with special new behaviors based on how they died. Invite them to join your Sims' household and they can be playable characters; if you dare, you might even find a way to bring your ghosts back to life."
They also revealed that swimming pools will return in November and December update will introduce new career paths and rewards.