'Heroes' star Ali Larter and husband Hayes MacArthur are expecting a baby, PEOPLE reports. "Ali and Hayes are thrilled to be expecting their first child," her rep told the magazine. The baby is due this winter.

"Ali is ecstatic. She and Hayes are absolutely over the moon about it. They have wanted a baby for what seems like forever and now their dream is coming true," a family friend told Star.

The friend adds, "It's going to be even more special because their baby is due on Christmas Day! They don't know what sex it is yet but Ali is definitely planning on finding out - hopefully at her next doctors visit!"

Larter and MacArthur wed last August in Maine after meeting several years earlier on the set of 'National Lampoon's Homo Erectus.'