Matthew McConaughey and Camila Alves are hoping to get pregnant "on or before" their honeymoon.

The Hollywood star proposed to his Brazilian girlfriend over Christmas. They already have son Levi, three, and two-year-old daughter Vida together and are now making plans to expand their family.

There are reports the pair will tie the knot in Camila's home country, and it's now suggested she may even be pregnant when the wedding happens.

"They're planning a beach wedding in the spring and hoping to get pregnant on or before their honeymoon," a source told National Enquirer.

The new arrival could be the first of several, as Matthew is apparently keen to have a lot of children. Although Camila doesn't want such a big brood, the actor thinks she will change her mind in the future.

"Camila would be happy with just one more baby, but Matthew is dead-set on having a large family," the insider added. "He's sure that the engagement will convince her to have at least two more children over the next five years."