Matthew McConaughey is set to become a dad for the third time.

The Hollywood star, 42, announced the news on Twitter, just a month after marrying long-term girlfriend, Brazilian model Camila Alves at their home in Texas.

"Happy birthday America, more good news, Camila and I are expecting our third child," the actor wrote. "God bless, just keep livin."

The couple, who started dating in 2007, already have two children, daughter Vida, two, and son Levi, three.

The Magic Mike star married his bride in June at sunset in front of family and friends at a ceremony reportedly overseen by a local pastor and a monk.