The clip shows the foursome speaking at the Royal Foundation Forum charity event, and when William is asked if they ever have a disagreement, the future king of England replied, 'oh yes', before Harry chirps in 'healthy disagreements'.
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Many royalists have now re-posted the video as proof of a royal rift.
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In the clip, the Duke of Sussex admits that the arguments come 'so thick and fast' that he's not even sure if they've resolved from their last row.
Wiliam then says: "Is it resolved? We don’t know."
Check out the clip below so you can decide: harmless joke or feud proof?
