Hollywood star Matthew McConaughey has sparked rumors he and girlfriend Camila Alves are expecting a baby boy - after reportedly buying gender-telling baby items online.

The Sahara star announced he would become a first-time dad after confirming earlier this year his Brazilian partner was 12 weeks pregnant.

And the 38-year-old said he was desperate to keep the sex of his unborn child secret - because he fears it will ruin the excitement of fatherhood.

But according to reports at the New York Daily News, the couple have discovered they are expecting a baby boy, after a source revealed to the newspaper the couple recently placed orders for T-shirts and bibs saying "Hunk" from baby website plainmary.com.