United Kingdom, Dec. 18 -- Jennifer Lawrence "hallucinated" on the set of The Hunger Games: Catching Fire after accidentally taking a sleeping pill.

The 35-year-old actress admitted she is "obsessive" about getting enough sleep when she is working and it led to an unfortunate mix-up one day that left her co-star Elizabeth Banks "really annoyed".

Speaking to her Don't Look Up co-star Leonardo DiCaprio for Variety's Actors on Actors series, she said: "You and I are both obsessive about sleep when we're working, like counting the hours...

"I also once took an Ambien in the morning, thinking it was something else.

" It was a dance scene with Philip Seymour Hoffman on the second "Hunger Games" movie. I was hallucinating. Elizabeth Banks go...