Now Spencer and Heidi have to pop out their little one and the Hills baby boom is officially over!

Whitney Port and husband Tim Rosenman have welcomed a baby boy, the reality star announced on Instagram today. The couple's son Sonny Sanford Roseman was born on Thursday July 27, and they chose not to know the gender during the pregnancy, so it was a complete surprise!

"Sorry I’ve been MIA for like a week! I lost my phone. Just kidding!! I made a human! Everyone is so happy and healthy and we are home now. I am beyond obsessed and in love and wish I could bottle this feeling for all of you out there," the former MTV star captioned the announcement.

She also opened up about her first few days of motherhood on her blog.

"Over the next few blog posts, I’ll tell you all about the entire day, the following days at the hospital and bringing him home, but for now I just want to talk about how I’m feeling. I love him and feel protective over him, but more than anything, I’m just like obsessed. I can’t stop looking at him, or thinking about him when I am in another room. It’s a bit like getting a toy you really really wanted as a child. There was all the anticipation and build up, and then you open it and you love it," she wrote.

"Unlike the toy, however, I am obviously never going to get sick of Sonny, and he poops. All kidding aside, my heart just grew to accommodate all this extra love I now have to give. I don’t care if this is sappy or trite and I don’t want to say that I love him more than anything ever because I love Timmy and my family. It’s not about loving him more than something else I love. It’s just awesome," she added.

What a little cutie!