The 43-year-old also said that though she has met Delevinge only a few times, their meeting has been very pleasant.
"Cara may become an icon: who knows how long she wants to do it for? It has just begun for her and she is doing amazingly well...I was actually asked to speak to Cara, but I don't know her very well," she said.
"I've met her a few times and she's been very pleasant. I haven't spoken to her properly yet. For me the timing has to be right," Campbell added.