Julia Stiles welcomes first child with Preston J Cook

Actor Julia Stiles and her husband

Preston J Cook

have become proud parents to their first child, baby boy, Strummer Newcomb Cook.

Although the actress, who has a host of TV shows to her name, had become a mother on October 20, she shared the news on Instagram where she posted a photo of her holding the one-month-old baby's hand.

"Strummer Newcomb Cook, born October 20, 2017. Thanks and ever thanks to the extraordinary doctors, nurses and staff at Mount Sinai for helping bring this utter joy into our lives," Stiles wrote.

The couple announced that they were pregnant in June.

Stiles and Cook got married in September on the beach in Seattle over Labour Day weekend.