Jack Osbourne and his wife Lisa Stelly are expecting their second child.
The couple, who welcomed their daughter Pearl in April 2012, are "super excited" to expand their family.
Confirming the news of her blog Raddest Mom on Tuesday (6 August), Lisa wrote: "Jack and I are super excited to share with you all that we are expecting our second baby! I am in my second trimester, feeling great & trying not to eat everything in sight. We feel so blessed that our family is growing & Pearl will have a little brother or sister to play with. It's crazy to think that we will soon be a family of four!"
She also tweeted: "This pregnancy is super special to me because my BEST friend is also pregnant at the same time @DrSommerWhaite!!!!"
Jack, 27, who married Lisa in Hawaii last October, previously credited his wife and daughter for helping him to grow up and move on from his wild partying days.
He said: "Getting married and having a child definitely has focused me. Now I'm not so much worried about going out on a Tuesday night and staying up until three in the morning and meeting hot chicks. No."
The former reality TV star, who has Multiple Sclerosis (MS), is doing everything he can to stay fit and healthy, but doesn't want the disease to control everything he does.
He said: "I appreciate things more. I don't know how long things will be as good as they are. It can become a progressive disease, though, and if it gets bad, the decline can be rapid. That's why I don't want to say my diagnosis was a good thing, but it has definitely put things into perspective."