(Photo Credit: Lucas Jackson/Reuters)

Kevin and Danielle Jonas announced they are having a baby girl during a live Ustream feed Thursday.

The couple shared the news with their fans by opening a box that read "Boy or Girl?" and when Danielle lifted the lid, pink balloons came floating out.

"We're having a girl!" the "Married to Jonas" stars said together.

Kevin Jonas, 25, added, "Yes, so excited, I'm going to be a father to a little girl."

Read: Kevin and Danielle Jonas Expecting First Baby

He followed up the live feed with an Instagram pic of the sonogram, reading "It's a girl!!!!! Thank you everyone!! She's sucking her thumb!"

Kevin Jonas took to Twitter back in early July to announce the pregnancy.

"@daniellejonas & I feel so blessed to be parents-to-be. Happy 2 be sharing this news!" the oldest Jonas brother, 25, tweeted.