Series star Nina Toussaint-White - who played Jude Thomas - made the announcement on Twitter on Saturday (December 8).
"Bad news.... No more Switch!" wrote the actress, adding the hashtags "#gutted #next".
Toussaint-White (Doctor Who), Lacey Turner (EastEnders), Hannah Tointon (The Hour) and Phoebe Fox (Black Mirror) starred in Switch as four flatmates who are also witches.
The show aired for a single six-part series, debuting in October with 879,000 viewers.
ITV is yet to officially confirm the cancellation of Switch, which was written by Chloe Moss and Tim Price.
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Watch Digital Spy's interview with the cast of Switch below: