The 36-year-old actress exchanged vows with American football star Nnamdi Asomugha in a low-key ceremony in June and now the pair is set to become parents, reported Us Weekly.
"She's about four months along," a source said.
The notoriously private star refuses to discuss her home life publicly, and recently revealed it pains her not to speak openly about her wedding day.
"I hate keeping secrets; that is the worst thing for me, because I always want to talk about it. I am really private about my personal life.