Sarah arrives back on screen in Australia next month, while UK fans will see her again from March.
Long-term viewers will remember that Karl Kennedy (Alan Fletcher) developed feelings for Sarah in the '90s, which rocked his marriage to Susan (Jackie Woodburne).
While the reason for Sarah's return to Erinsborough is unconnected to Karl, it remains to be seen whether the pair's relationship could be reignited.
Nicola Charles, who plays Sarah, commented: "I can confirm that Sarah wreaks havoc and also let you know that it's not actually Karl who brings Sarah back to Erinsborough - it's something separate.
"Needless to say, once she is back, lots of things need to be addressed."
Neighbours returns to Australian screens on January 7 and Channel 5 in the UK on January 14.