Megan Fox
may be transforming into a mom!

The sexy 25-year-old and husband Brian Austin Green are expecting their first child together, according to E! Online.

While Star Magazine broke the story last month, E! sources have also just confirmed the news ... giving it some more credibility. So far, no official word from Fox or Green.

Though this will be their first child together, Green has 10-year-old son Kassius with his ex, Vanessa Marcil.

"I want at least two, probably three kids," Fox recently said in a interview with Cosmopolitan. "I've always been maternal."

Congrats to the couple on the good news!