HOLLYWOOD, Calif. — Matthew McConaughey and Camila Alves are adding to their family.

Less than one year after giving birth to the couple's first child, the Brazilian model is pregnant once again.

"Happy Father's Day. It's my first, and the last 11 months with Levi and Camila have been the most rewarding adventure to date," McConaughey wrote Sunday night on his Web site. "We have more blessed news to celebrate this Father's Day that [will] make this time next year double the fun. Levi is going to be a big brother... Yeah, we pulled off the greatest miracle in the world one more time, Camila and I are expecting our second child, bringing more life into the world, making more to live for. The future looks bright as the family grows.... just keep livin, Matthew and Camila."

McConaughey, 39, and Alves, 27, have been dating since 2007.

The couple welcomed their son, Levi, on July 7, 2008 in Los Angeles.