Keira Knightley, James Righton Keira Knightley, James Righton

Actress Keira Knightley is taking on her most difficult role yet: mom! The British actress gave birth to her first child with husband James Righton, E! Online reports.

38 must-see summer shows

Tthe couple is being private with details. The baby's date of the birth, gender, and name are being kept under a snuggly little blanket.

The couple announced they were expecting a baby back in December.

You won't have to wait too long to see Knightley, 30, on the screen again. She'll next appear in big-budget adventure film Everest, due out in September.

TODAY'S VIDEO: On the set of iZombie: What are those brains really made of?