Mary Berry
From Tardis Wiki, the free Doctor Who reference
Dame Mary Rosa Alleyne Hunnings (born 24 March 1935[source needed]) portrayed a fictionalised version of herself in the Doctor Who crossover story Looking for Pudsey.
When Twelfth Doctor wanted the First Doctor to lead the way to his Tardis, the Twelfth Doctor said "over to you Mary Berry" (TV: Twice Upon a Time).