Good news for Fall Out Boy Fans!!!

The band's bassist Pete Wentz, and his model girlfriend, Meagan Camper are expecting their second child (third for Wentz) and it's a baby girl, Wentz revealed.

The 38-year-old musician took a photo of his two kids on announcing the good news on Instagram Monday.

The couple, who started dating in 2011, is already a parent to son Saint Lazslo, 3 where Wentz shares son Bronx Mowgli, 9, with his ex-wife Ashlee Simpson Ross.

Wentz and Simpson ended their three years long married relation in 2011. After the divorce, Wentz increased his closeness with Meagan while Simpson started dating Evan Ross. In an interview, last month, Simpson, 29, told she got engaged to Ross.

Talking with Wendy Williams, Wentz said he and his partner have been seeking for the right moment to tie the knot. He told,

I think so. I mean, we talk about it a lot. I feel really lucky. It's, like, really interesting [to be] in a relationship with someone who is truly my best friend

He added,

Like, I talk to her about everything. She will tell me when I'm being not so insane, and sometimes she's like, 'You're being a little bit insane.' It's very helpful.

The Illinois native musician battling bipolar disorder since and has been taken medication for it since. Wentz attempted suicide in February 2005 by taking an overdose of the anxiety drug Ativan.