HOLLYWOOD: Catherine Zeta-Jones flashed her boobs onstage. The actress was performing in a Broadway production of 'A Little Night Music' recently when she accidentally showed the left-hand half of the audience more than they had paid to see.

One stunned theatre-goer said: "I couldn't believe it. No wonder her husband Michael Douglas looks so happy. The couple sitting next to me also saw it and poked each other."

The 40-year-old actress was appearing in a scene where her long-lost lover returns. Overcome with passion, Catherine opens her kimono to show him what he's been missing. Usually, the actress stands facing the back of the stage to protect her modesty, but was caught in the wrong place and ended up revealing both breasts to unsuspecting — but thrilled — audience members.

Catherine married Michael in 2000. They have two children together, Dylan, nine and six-year-old Carys.

The actress started her run in the musical earlier this month, and appears alongside Angela Lansbury. She has received lukewarm reviews, with several critics claiming she can't act and sing at the same time.