Grandma Sharon, 59, gave a live Twitter chat Wednesday and spoke a little more on her feelings about the new addition to the Osbourne family.
The Talk host even volunteered to babysit! She wrote, "I will love babysitting b/c with all the wonderful things we're giving away on The Talk on CBS on Friday, I'll be prepared!"
Jack's sister, Kelly Osbourne, also took to her Twitter to react to the birth of her niece. "Thank you so much for your congratulations but they really should be going to Lisa Stelly and Jack Osbourne! I am one proud Auntie!"
Jack, 25, and Stelly's daughter Pearl weighed a healthy 8 lbs., 6 oz. at birth. The couple announced their engagement in September.