Megan Fox is reportedly pregnant with her first child and could not be more "thrilled."

The 26-year-old Transformers star has been married for two years to Beverly Hills 90210 star Brian Austin Green.

And although the couple has yet to make a formal announcement, friends of the brunette beauty says it's something she has wanted for a long time.

"They're thrilled about the baby!" an insider told Us Weekly. "The pregnancy was planned. She has wanted a baby with Brian for a while."

Megan said earlier this year that she "always loved kids" and adores being a stepmother to Brian's 10-year-old son Kassius from his relationship with his ex Vanessa Marcil.

"Brian knows that Megan is mom material," the insider added. "She is amazing with Kassius."

"Megan is front and center, cheering, giving out juice [at the boy's baseball games]. She's like every other mom."