Megan Fox is reportedly pregnant.

The 25-year-old actress is said to be expecting her first child with husband Brian Austin Green and the couple are thrilled with the happy news.

"They just found out and are incredibly excited," a source told Star.

Megan and Brian had kept the news to just close family and friends something they have found difficult because they are so excited about the baby. "It's still early, so they are only telling close friends and family members," the source added.

The Friends with Kids star has already had lots of parenting practice as she is stepmother to Brian's nine-year-old son Kassius, his child with actress Vanessa Marcil. "Megan has become a great stepmom, and Brian knows she'll be wonderful with the baby. She has really grown in the past couple of years ... her family comes first," the source said.