Chelsy Davy has phoned Kate Middleton to wish her luck on her engagement and becoming a Royal.
Prince Harry's ex, 25, also told Kate she would make a beautiful bride.
A pal of Chelsy last night said: "The news of William and Kate's engagement came totally out of the blue for Chelsy. She was very happy for Kate.
"Their conversation was short but it was very friendly.
"Chelsy told Kate she would look beautiful. They were never best friends but their shared experience of dating a prince brought them close."
Zimbabwean-born Chelsy — who split from Harry, 26, after moving back to Africa — is not holding out for an invite to the April 29 bash at Westminster Abbey.
But the news about William and Kate, both 28, made her reflect on her own former relationship.
Her friend said: "She hated the etiquette that came with dating a Royal and doesn't miss that side at all. But she's mixed up about what she does want and still holds a candle for Harry." St James's Palace declined to comment.