Taking to Instagram this morning, the couple welcomed the new addition to their family, announcing the bub’s adorable name at the same time.
World, meet Sonny.
As well as sharing the cute first pics on her website, Whitney wrote a message to fans about their boy:
"Sorry I've been MIA for like a week! I lost my phone," she wrote. "Just kidding!! I made a human! Sonny Sanford Rosenman was born on 7/27/17!!"
"Everyone is so happy and healthy and we are home now. I'm going to try my very best to not be one of those moms whose feed is dominated by their baby but I can totally see how difficult it will be not to."
"I am beyond obsessed and in love and wish I could bottle this feeling for all of you out there. Check out the blog (link in bio) for more and welcome our little one to the world!!"
The pair made the pregnancy public back in February in chic Insta post.