X-Men: Apocalyse star Lawrence said she was on a night out with British comedian Jack Whitehall when the two spotted Star Wars actor Ford and director JJ Abrams and she mistakenly thought they would know who she was.
She told Graham Norton: “I probably humiliated myself more than ever before.
“I never assume anyone knows who I am, but when I spotted Harrison Ford and JJ Abrams I was like: ‘It’ll be fine, we’re all co-workers, right!’
“So I went up to them and started dancing like an idiot and the whole table just went quiet and stared at me.
“I realised while I am dancing that they had absolutely no idea who I was so I just turned around and walked back to Jack dying of embarrassment.
“Later [Ford] wrote to me because someone with a 12-year-old must have told him who I was!”
Whitehall called it “probably the best night of my life and Jen’s worst” when, in an awkward twist, Ford did recognise him as the two of them had just filmed a show together.