Megan Fox is pregnant with Brian Austin Green's second child

Rumors have swirled recently, but it's now official -- "Transformers" star Megan Fox is pregnant! E! confirms that Fox and her "Beverly Hills, 90210" hubby Brian Austin Green are expecting their first child together.

Fox, 25, married Green, 38, in the summer of 2010. This is her first child, and his second -- he shares custody of his 10-year-old son, Kassius, with his ex Vanessa Marcil.

"Megan has become a great stepmom, and Brian knows she'll be wonderful with the baby," a source told RadarOnline. "She has really grown in the past couple of years. Megan used to only be concerned with her career, but now family comes first."