Kevin Jonas Baby: 'First Time' Singer and Wife Danielle Announce They're Having a GIRL on Jonas Brothers Smartphone App, Family Celebrates on Twitter [VIDEO]

It's been almost two months since the oldest third of the Jonas Brothers, Kevin Jonas, and his wife Danielle announced they were expecting their first child. Yesterday, in a live announcement on the Jonas Brother smartphone app, the "Married to Jonas" couple told the world the sex of their child... and they're having a baby girl!

Following a few technical difficulties -- including the influx of visitors to the Jonas Brothers app crashing the server -- the couple were finally ready to make the big announcement.

"I think it's only appropriate that we keep this short and simple instead of dragging it along, so let's do this thing," said Kevin. The couple then preceded to open a box full of pink balloons, as the happy couple exclaimed "We're having a girl!"

Soon after, Kevin and Danielle shared the latest ultrasound of their daughter, and adorably exclaimed how happy they were she was sucking her thumb.

Watch a video of the baby announcement below.

Following the news, the soon-to-be parents and their family members took to Twitter to express their excitement about adding a girl to the very boy-heavy Jonas family.

It's a girl!!!!! Thank you everyone!! She's sucking her thumb! https://t.co/Zpf7QuMluA

— kevin jonas (@kevinjonas) August 29, 2013

It's a girl !!! Iam so happy I been able to share everything & not have secrets it's been so nice. Thank u for all the tweets of excitement — Danielle Jonas (@daniellejonas) August 29, 2013

Finally a girl! So happy for @kevinjonas and @daniellejonas - I am so ready to spoil this child!!!

— Papa Jonas (@PapaJonas) August 29, 2013

After years of testosterone-Finally estrogen!! I am so blessed to have a granddaughter — Denise Jonas (@DeniseJonas) August 29, 2013

The baby's due date has yet to be revealed, but the couple is reportedly due in early 2014.

Now that Kevin and Danielle know they're having a girl, it's time to start thinking of baby names! Happy wishes to the lucky couple!