The 33-year-old, who vowed not to wed until same sex marriage was legalised in California, popped the question to her partner Shephard in June over Twitter, reported E! Online.
"We're not having a wedding. It's not a desire of either of ours to have any sort of day of celebration for us. I feel like we get enough attention in our daily lives and we just want something sort of private that involves pen and paper.
"It could be any day. Honestly, I could go home and we could do it today, there's no forethought really going into it," she said.
"We do want all of the legal opportunities that come with a binding marriage, especially now that we have a kid. It's very important, there are a lot of things that you need to make available and have in writing for your kid... Yeah, one of these days though," Bell added.
