Matthew McConaughey and girlfriend Camila Alves are having a baby boy, it was claimed today.
According to US reports the couple were told the sex by a doctor during a pregnancy scan - despite saying they wanted it to remain a secret.
A source close to the couple said: "During the ultrasound the doctor referred to the baby as a 'he'.
"Matthew was so upset with the doctor for giving it away.
"When the doctor realized what he'd done he felt bad and tried to say he calls all babies 'he.'
"But then he confessed that wasn't really the case after Matthew demanded to know the truth."
Brazilian-born model Alves, 25, is due to give birth on July 4 - Independence Day in America.
Fool's Gold star McConaughey, 38, recently bought a new $10 million home in Malibu, California for his growing family.
A spokesman for the actor was unavailable for comment.
Meanwhile, it has been claimed that McConaughey's elderly mother, Kay, is pushing him to propose.
A source told a US magazine: "Kay's in her seventies and doesn't want to leave the planet knowing Matthew is alone, without his own family to love him and take care of him.
"Kay loves Camila and is so happy that Matthew is giving his hard-partying ways a break and finally thinking about a more solid future."