Pride, Prejudice and Jasmin Field by Melissa Nathan
Published in 2001, this is one of the earlier members of the Jane Austen spin-off club. It's the story of Jasmin Field, a columnist for a women's weekly, who lands the part of Elizabeth Bennet in a charity production of Pride and Prejudice.
Almost immediately, there is friction between her and the director, Oscar-winning actor Harry Noble.
Yes, it's pretty obvious where this hostility will lead, but Nathan is not precious enough to have her characters pretend they don't see the parallels. And though the parallels with the plot of P & P are many, they are made different enough by the time and setting to avoid feeling like carbon copies.
Nathan has also written a novel called Persuading Annie, based on (you guessed it!) Persuasion, which I plan to find.