The 34-year-old was reportedly seen backstage at the BBC show looking a bit glum.
TV presenter Caroline and Jack were together for 18 months, but a source told The Sun their relationship has come to a ‘natural end’ with a ‘mutual’ decision and no signs of anyone else involved.
She is now preparing for the Strictly semi-final in Blackpool with her dance partner Pasha Kovalev, after topping the leader board with 39 points for her Argentine Tango.
Cazza likened her Argentine Tango to a 'really dramatic game of Twister'.
Contestants have previously dismissed the so-called ‘curse’ of Strictly in interviews earlier in the series, saying their partners were excited for them to appear on the show.
The split is the latest in a run of break-ups over the course of SCD history.
Earlier this year, Ben Cohen announced he was taking “time apart” from his wife of 11 years, ten months after his appearance on the BBC show. In February, news presenter Susanna Reid broke up with her long-term partner Dominic Cotton weeks after appearing in the final.
Mark Wright is also in this year’s SCD – should he be worried about his relationship with Michelle Keegan?
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