Camila and Matthew McConaughey
12/28/2012 AT 06:10 PM EST
It's a very merry holiday week for Matthew McConaughey
and his wife Camila.
The couple welcomed their third child together in Austin, Texas, on Friday, sources confirm to PEOPLE.
The pair, who are also parents to Vida, who turns 3 next month, and Levi, 4, announced the pregnancy
just one month after their June nuptials
Camila, 29, joked that even as she put on pregnancy pounds, her actor husband, 43, was losing weight
– dramatically – for The Dallas Buyers Club,
in which he plays the real-life Ron Woodruff, who contracted HIV.
"We have gone the complete opposite direction eating wise, but we're navigating it," she said last summer.
"But I don't really have cravings yet."
McConaughey's latest movie, Mud,
will be released April. 26,