Megan Fox has welcomed her first child with husband Brian Austin Green.

The actress gave birth to a baby boy last month, but kept the news a secret until now.

The Transformers star made the announcement via her Facebook page, writing: "We have been very lucky to have had a peaceful few weeks at home, but I would like to release this myself before others do.

"I gave birth to our son Noah Shannon Green on September 27th. He is healthy, happy, and perfect."

Fox added that she and her husband Green are thankful for their new addition, saying: "We are humbled to have the opportunity to call ourselves the parents of this beautiful soul and I am forever grateful to God for allowing me to know this kind of boundless, immaculate love.

"Thanks to those of you who wish to send your positive energy and well wishes. May God bless you and your families abundantly."

The 26-year-old married Green, who has son Kassius, 10, from a previous relationship, in 2010 in Hawaii.

Fox and Green welcome first child together