Proud Papa-in-the-making, actor Matthew McConaughey, 38, wants to keep riding the roller coaster of anticipation he's been on since learning the happy baby news. So he doesn't want to learn the sex of his unborn child.

It's reported that the star of 'Fool's Gold,' whose girlfriend, Camila Alves, is 12 weeks along, wants to remain in the dark, as he fears that finding out the gender of the baby would ruin the excitement of first-time fatherhood.

"We want to keep the suspense as high as possible," McConaughey says. "I'm looking forward to the big adventure! One thing I've heard that's consistent is, 'whatever plans you make, throw them out the window!'"

[SP]