Facebook users who have been affected by the Cambridge Analytica scandal will begin getting notifications today.
Most of the 87 million affected users are in the U.S., but the data-mining scandal also affects more than 620,000 Canadians.
The notification to affected users comes in the form of a detailed message on your Facebook news feed.
Meanwhile, another message is going out to all 2.2 billion Facebook users, with a link to information on which apps they use and what information they've shared.
Cambridge Analytica allegedly used ill-gotten Facebook user data in its efforts to sway elections, but the political data-mining firm says it only ever received data on 30 million users.
The federal and British Columbia privacy commissioners are both investigating Facebook.
with files from The Canadian Press