Casualty and Personal Affairs actress Laura Aikman is among the new recruits who have joined the BBC One drama for its last run of episodes.
Further details of Aikman's character will be revealed nearer the time, but show chiefs have promised that she will be playing a lead role as a new arrival in the staff room.
Aikman commented: "I'm very pleased to be starting filming on Waterloo Road and to be joining the very talented cast. It's exciting to be part of the final series."
Fresh Meat's Rege Jean Page and actor Stefano Braschi have also joined up to play new staff members.
Viewers can also expect some new pupils, with former Hollyoaks actor Andrew Still - who played Joel Dexter on the Channel 4 soap - among those joining the school.
Former River City cast members Holly Jack and Finlay MacMillan will also be playing students alongside Broadchurch's Charlotte Beaumont and new talent Armin Karim.
Executive producer John Griffin commented: "This will be the last series of Waterloo Road and we plan to give our incredible fanbase a final term they will never forget. In true Waterloo Road style, we're set to go out with a bang."
Christopher Aird, Head of Drama at BBC Scotland, added: "We're delighted to welcome some fantastic new home grown talent to the wonderful cast of Waterloo Road. Each of our new pupils have some very exciting storylines. We're sure the viewers will enjoy seeing them each make their mark on the school."
Filming on the final series of Waterloo Road is already under way ahead of broadcast in early 2015. In the meantime, the final ten episodes of series nine will transmit later this year.
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