Alanis wrote : "She's here! Onyx Solace Morissette-Treadway June 23 2016 #beyondblessed (sic)"
The happy couple - who already have five-year-old son Ever Imre together - announced they were expecting their second child earlier this year with a sweet song and an animated video, which ended with the trio looking at an ultrasound picture.
Captioning the video on her website, the 42-year-old singer wrote: "The story of my nuclear family in moving pictures, brings us up to this sweet moment. [The song was] written, recorded and produced in 6 hours on May 22, 2010 with Guy Sigsworth, on the sly, to surprise Souleye. Brendan Huza helped tell our story. May this song take on ever-deepening meaning as each year goes by. (sic)"
Meanwhile, in her spare time, Alanis is currently working on a book that is half memoir and half "reflections, insights, regrets, and just straight-up teaching".
She shared: "I've always had a little of a blind spot around how I am perceived. But there's uniformity now. This may be a crass way of understanding it, but there's something about even looking at my own Instagram, looking at my blog, where I'm getting a sense of self that I never had."
And Alanis feels her priorities have changed since becoming a mother.
Opening up about how she felt when she started in the entertainment industry, she added: "All due respect to the geniuses that were around me, I felt like a bit of an outsider. I tried really hard to fit in and belong and have BFFs that were famous. It could have had something to do with the time period. It wasn't 2016; it was the '90s and early 2000s. It was a different time for women in music. I would awkwardly phone different celebrities to see if we could be friends. And a lot of times I would be met with, 'Why are you calling me?' I guess people don't call people just to become friends with them."
