The Harry Potter star announced on her blog that she will be taking a break from making movies in order to concentrate on her studies.
Watson wrote: "You might not hear from me for a while because I will be really busy studying, but I wanted to just say hi and goodbye.
"Have a great term and good luck with all your work," she added.
In July, Watson revealed that she plans to return to Brown University after studying abroad for a year at Oxford.
The actress previously announced plans to take time off from college in order to focus on her other commitments.
Watson can next be seen in My Week with Marilyn opposite Michelle Williams.
My Week with Marilyn opens on November 18 in the UK and November 23 in the US.
Watch the trailer for My Week with Marilyn below: