Fall Out Boy’s Pete Wentz welcomes first daughter with girlfriend Meagan Camper

Pete Wentz and his partner Meagan Camper have announced they've welcomed a baby girl.

The Fall Out Boy guitarist and his model girlfriend revealed their happy news on Instagram on Sunday night with an adorable family snap at the hospital.

He also revealed the unusual baby name they picked for their first baby girl, and it's definitely fit for a superhero - Marvel Jane.

‘So excited to introduce Marvel Jane Wentz. Feeling so grateful that she’s here… annnnd she’s already ready to takeover the world,' he captioned the picture.

'Happy Mother’s Day @meagancamper and all the moms out there. We love you,' he added.

Confirming the news to People magazine, Pete said in a statement: ‘We are so happy to welcome Marvel Jane Wentz into the world. Her brothers are both very excited about their brand new kid sister.’

Baby Marvel is Pete’s third child but his first daughter; he’s already dad to nine-year-old son Bronx Mowgli with ex-wife Ashlee Simpson, and welcomed his three-year-old son Saint Laszlo in 2014 with Meagan.

Pete and Meagan, 29, met in 2011 and confirmed they were set to welcome their second child on New Year’s Day.

He revealed on social media: ‘We’re kicking the year off with news of the best gift yet: coming to our family in 2018... love Pete, Meagan, Bronx and Saint.'

Opening up about expecting his first daughter, Pete previously told People: ‘We have a lot of testosterone in our house.

‘I see my friends who have daughters, and it seems like a whole different kind of love that they have for each other, so I look forward to that being a completely new journey. Hopefully it’ll bring some balance to our home!’

The 38-year-old previously likened being a father to taking ‘happy pills’, as he finds his young tots’ laugh to be ‘the funniest thing on the planet’.

He said: ‘I have two kids, and if I hang out with them it’s pretty much like taking happy pills. When you hear a one-year-old laugh, it’s pretty much the funniest thing on the planet. It changes my mood.

‘My highs, my happiness are really high and my lows are very low and I’m not able to regulate between the two. Through actual therapy and having kids it’s way more under control and something I can see when I’m on the roller coaster and control it more.’