Thompson says of Hepburn’s performance in My Fair Lady: "She can't sing and she can't really act, I'm afraid. I’m sure she was a delightful woman -- and perhaps if I had known her I would have enjoyed her acting more. But I don’t and I didn’t, so that’s all there is to it, really.”

Well, harumph.

Thompson’s dig comes as she’s been contracted to update the 1964 film about a Cockney street urchin transformed into a society swan.

Thompson, who says the character Eliza was “sold into sexual slavery“ by her father, will reincarnate the story into a feminists’ parable.

"I suppose my cheekiness is in saying: 'This is a very serious story about the usage of women at a particular time in our history. And it's still going on today. Yes, OK, it's a wonderful musical, but let's also look at what it's really saying about the world."

Which sounds like a “brilliant idea,” as the Brits like to say. But Hepburn wasn’t working off that idea. To diss her nearly 50 years later for interpreting the character differently makes Thompson come off as an unfair lady.