Mamma Mia's Amanda Seyfried has given birth to her second child

Congratulations are in order for Amanda Seyfried and her husband Thomas Sadoski.

The Mamma Mia: Here We Go Again star has welcomed her child into the world.

The 34-year-old actress gave birth to a healthy baby boy, but the couple are yet to announce the newborn's name.

Announcing the exciting news on INARA and War Child's Instagram pages, the couple shared an adorable photo of Amanda holding their newborn son's hand.

Alongside the photo, they wrote: "Since the birth of our daughter three years ago our commitment to the innocent children that are so brutally affected by conflict and war has been a driving force in our lives.

"With the birth of our son, the work of INARA and War Child has become our North Star."

The post on INARA's page reads: "We are so happy to join with @warchildusa to be the first to announce that our board members @mingey @thomas_sadoski welcomed their second child into this world."

The couple are already parents to a three-year-old daughter called Nina.