PIERS Morgan has mocked his BBC Breakfast rival Dan Walker after it was revealed he'll be taking part in this year's Strictly Come Dancing.
The 44-year-old star's appearance was confirmed during today's instalment of the morning show - and Piers was among the first to react.
The pair are embroiled in a long-running feud triggered by competition over viewing figures when Piers hosted ITV's breakfast show rival Good Morning Britain.
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