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The Jonas Brothers are adding a girl to the family. 

On Thursday, eldest brother Kevin and his wife Danielle announced that they are expecting a baby girl.  The singer posted a photo of the sonogram on Instagram, with a little pink bow drawn onto her head.  The Jonas baby is shown sucking on her thumb in the sonogram photo. 

Kevin had clued fans in on the  announcement in advance, teasing earlier in the week that those who had purchased the Jonas Brothers mobile app would be the first to get the news.  

The couple announced they were expecting last month.  Shortly after, the father-to-be confessed to "E! News" that he liked the idea of having a daughter.  He said that he'd "love to see a girl in the midst of all these boys all over the place."