The Hour actor, who played MI6's new Q in last year's action blockbuster, said that he and Daniel Craig will "probably be back together again in about ten months".
"Well, hopefully. Let's hope so!" he told the Radio Times.
Asked if there was any actor he'd like to see play James Bond when Craig's tenure finished, Whishaw replied: "I know that he's doing the next three so I'm not thinking beyond that. We've got to just get through those first."
It had previously been reported that Craig had signed up to play 007 in two further outings. Mendes is believed to be close to securing a deal to direct the franchise's 24th instalment.
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