Megan Fox is ready to have a baby.

The 'Jennifer's Body' star thinks the time is right to start trying for a child now she and actor Brian Austin Green are married.

One friend of the actress said: "She's longing to get pregnant and have a child with Brian and they are already building a nursery room at their Hollywood Hills mansion."

The couple tied the knot in a small ceremony in Hawaii last month at the Four Seasons Resort on the Big Island with Brian's eight-year-old son Kassius - who he has from a previous relationship with Vanessa Marcil - giving his dad away.

Megan, 24, has previously revealed she feels like a mother anyway because she has been raising stepson Kassius for years.

She said in a magazine interview before her wedding: "I am a stepmother to the fullest extent. I have looked after Kassius since he was three and he has no memory of life without me. For some reason, no one wants to look at me that way, but I am responsible for him and I've never struggled with that, from bedtime stories to the school run."