Liam Payne is "having sleepless nights" while trying to finish his solo album before his baby is born.
Liam Payne and Cheryl
The 23-year-old singer's girlfriend Cheryl, 33, is expected to give birth very soon and Liam has been frantically trying to complete his debut record, by putting in all night recording sessions at Sound Tracks studio in north London, before the baby arrives.
A source told The Sun on Sunday: "Liam is in a real rush to get as much done before Cheryl goes into labour.
"He did as much work on his music in LA as he could but obviously he will be a father any day now so he's in London and has his phone on loud so he can rush to her side immediately if he has to.
"But until that happens he will continue spending as much time in the studio as he can. It's not ideal right now but it will mean he's completely free to dote on mum and baby when the time quickly comes.
"But it's fair to say he's already completely knackered due to this schedule. People at the studio only see him at night and he locks himself away from 9pm until 4 or 5 in the morning, only taking an occasional cigarette break."
Liam signed a record deal with Capitol in the UK and Republic in the US and is reportedly set to launch his solo career in September.
Record label bosses are keen for Liam to get his music out as soon as possible after seeing how well his former One Direction bandmate Zayn Malik has done in the US.
A source recently said: "The record company are eager for him to get his music out there after seeing how well Zayn is doing in America.
"His record company are hoping to put him on big US chat shows to perform. They need him to spend some time in LA to show he's committed."
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