Jennifer Lawrence burst into tears after director David O. Russell ruined literary classic Anna Karenina by telling her the ending.

The Hunger Games star was reading Leo Tolstoy's classic tome while filming Russell's latest movie American Hustle and impressed the director with her devotion to the book.

However, the Oscar-winner was left in tears when Russell revealed the ending of the book before she reached its conclusion.

He tells the Hollywood Reporter, "She's walking around the set all the time reading the Tolstoy novel Anna Karenina, which is like a phone book. I was just impressed that this 20-year-old girl is reading Anna Karenina - from Kentucky, who likes to eat junk food, and watch Real Housewives of Long Island. I go, 'Oh wow, you're down to almost the end, Jennifer. Have you gotten to the part where she throws herself under the train tracks?' And she goes, 'What?' She goes, 'Surely, surely Vronsky (the title character's lover) is coming back!' And she starts crying, she's sobbing. I've never had an experience like that in my life, this 20-year-old person who is living every ounce of Anna Karenina."