Pop singer Joe Jonas and Game of Thrones star Sophie Turner attempted to put on a united front as they head to divorce court, but insiders allege that behind the scenes, the two were going for the jugular, Breaking Celebrity News has learned.

While the fractured exes reportedly had an "ironclad" prenuptial agreement to take care of money matters, sources claim a custody battle over their two daughters — three-year-old Willa and a one-year-old, whose name has not been divulged, could get nasty.

"It's the same old Hollywood story where the couple announce how they want to resolve things amicably," a source told the National Enquirer. "But Joe's already splashed big bucks on a high-profile divorce attorney and the kids are the only real contention. I think this is a case of actions speaking louder than words."

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The tipster alleged that the Sucker singer has been caring for their daughters for the past several months while he tours with his bandmate siblings, Nick and Kevin, as the Jonas Brothers — and busy Turner shoots the British TV series Joan in England.

Insiders claimed one factor that could impact the custody arrangements was Turner's alleged partying lifestyle, which reportedly caused friction in the four-year marriage and allegedly contributed to Jonas filing for divorce on September 5.

While Turner has been the source of memes after downing a glass of wine on the big screen at a past NBA game, Jonas allegedly curbed his drinking after deciding to break unhealthy habits.