As host, it was Joanna's job to introduce each of the award's presenters and while welcoming Jennifer to the stage, she gushed over the USA star, proclaiming her to be "the hottest woman on the planet".
"Okay so backstage Joanna and I were both about to go out... and I was like, "Just [say] adjective after adjective, "tall", 'beautiful", just say that I'm this and that".
"And she was like, 'Alright, darling!', and then she goes on stage".
When Lawrence took to the stage to present an award, she opened with: "Hi, that was a bit much, but thank you, Joanna". "It would have been like, 'So you agree?'" "(Joan Rivers was right when she nicknamed her 'Miss Arrogance") and she was rude to Joanna Lumley last night.
Others on the social network went on to suggest that Jennifer Lawrence's presentation was lackluster and moody, and could not believe she had the gumption to diss Lumley.
"Everybody thought that I was being rude", she started.
Hailing Jennifer as "ravishing" and "the hottest actress on the planet", the 27-year-old chose not to be as warm as her welcome as she made her way onstage, tersely dismissing Joanna with a roll of the eyes and opening with: "Hi".
"You know, you're watching these hurricanes now, and it's really hard, especially while promoting this movie, not to feel Mother Nature's rage and wrath", she said back in September.
"I'm not a huge fan but I totally got what she meant, even if her tone may have seemed a bit off", one user wrote.
Jennifer told the Mirror that the incident was actually an "inside joke" between her and Joanna after learning of what the host would be saying to introduce her.
Beginning the ceremony, Joanna Lumley said: "Right let's start giving out some of those lovely BAFTAs shall we?"
While another tweeted: "Joanna Lumley does not no enough about Jennifer Lawrence to use appropriate language in her intro to Jennifer Lawrence".