GG / Fame Flynet 1 / 9
GG / Fame Flynet 1 / 9

Cameron Diaz showed off her generous side on the set of her new film, "The Other Woman," just before the shoot wrapped earlier this month by treating the cast and crew to a fast-food picnic.

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The actress reportedly paid $1,000 for a McDonald's feast to thank her co-stars, such as Leslie Mann and Kate Upton, and crew pals for working around the clock to complete the movie.

A source tells In Touch magazine, "Everyone was there working hard to finish up the final scenes and they were famished, so Cameron gave her assistant $1,000 in cash and had her make a run to McDonald's."

The source continued, "It was like a big picnic -- so much fun. Everyone was really grateful."

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