Joanna Lumley (in-universe)

From Tardis Wiki, the free Doctor Who reference
You may be looking for the real-world actor.

Iris Wildthyme once claimed that she knew Joanna Lumley when she was a "Bond girl". (PROSE: Came to Believe)

Behind the scenes

Although the connection wasn't made in PROSE: Came to Believe, the real Joanna Lumley portrayed an alternate Thirteenth Doctor in TV: The Curse of Fatal Death.