The couple got married in a small ceremony at the Four Seasons Resort on the Big Island of Hawaii with Brian's eight-year-old son Kassius, who he has from a previous relationship with Vanessa Marcil, Contactmusic reported online.
"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," a friend of the actress said.
The 24-year-old star had previously admitted that she feels like a mother anyway as she has been raising stepson Kassius for years.
"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," Fox had said.