We already know that season two will be the last outing for Claire Foy and Matt Smith as Queen Elizabeth and Prince Phillip on The Crown, as they are replaced by older actors.

And while it remains a mystery as to who will take over, one person that does know is Foy herself… though she's being a royal tease about the whole thing.

"I know who's doing it and I'm not telling you … It's really exciting and great and amazing!" she told press at the BFI London Film Festival.

Ugh, way to leave us in suspense, Claire!

Frazer Harrison/Getty Images

Speaking of signing up for just two seasons of The Crown to play the younger Elizabeth II, the star added: "I always knew from the get-go that I was only going to be doing two series.

"I'm just very, very grateful that I have had such a wonderful time playing that part and made friends for life, and just had the best time ever. So I'm very, very grateful and amazed that I can go and do other stuff, hopefully."

The action is due to jump forward in the third season, before plans to jump in time again between seasons four and five.

Netflix

However, Foy has previously said that there was "no bitterness" about leaving the role, explaining: "Someone else will take on this amazing role and I'm not the first person to play that part.

"I have taken that role on from other people who've played it before. So it's in the nature of the role that it will keep reincarnating and that that story will keep being told.

"I can't wait to watch it and I just think whoever they get to play that part, they'll be extraordinary because they're an extraordinary team. I will never watch it with any sense of bitterness or regret."

The Crown is due to return for its second season on Netflix on December 8.

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