Maggie Gyllenhaal and Peter Sarsgaard expecting another girl

(CBS News) Maggie Gyllenhaal is expecting another girl.

"I'm so pregnant," the 34-year-old actress told USA Today, while promoting her new film "Hysteria.

Pictures: Maggie Gyllenhaal
Pictures: Celebrities who are expecting

"I find it difficult to pretend you're not pregnant, which I had to do. I didn't let anyone know until three and a half months this time," said the actress, who still attended film festivals while pregnant. She told USA Today that while at events, she had to deal with morning sickness and always kept pretzels in her purse.

Gyllenhaal refuses to release her due date to protect her family from the press.

This is the second child for Gyllenhall and her husband, actor Peter Sarsgaard. Their daughter Ramona is 5. The couple wed in Italy in May 2009.