They were allegedly planning to tie the knot at some point over this coming summer, but the expected wedded bliss between Ryan Gosling and Eva Mendes could be in jeopardy.  

Anna Kendrick Reveals Why She & Ryan Gosling Would Never Have Worked As A Couple

According to a pair of back-to-back reports by OK! Magazine, the actors, who welcomed their daughter Esmeralda together last Fall, are not only arguing about their prenuptial agreement ahead of the wedding, but are also fighting about everything else--including the care of their little girl.  

"They can't agree on anything," a source told the magazine in their more recent report, adding that they can't compromise on issues including how they want to raise their 9-month-old, and even have problems figuring out if they actually want to walk down the aisle.  

Ryan Gosling Says He 'Trusts' & "Admires' Eva Mendes

"They used to have incredible chemistry, but the fun has been sapped from their relationship," the source said.  

The report comes one day after the magazine also claimed to speak to sources who were worried that Gosling is trying to delay marrying his girlfriend of several years by insistently arguing over their prenup.  

According to that report, Mendes is reportedly worth $15 million, and she wants to protect that cash after taking a back seat from work to raise their daughter--especially after she has been allegedly funding the pair's entire relationship because of her beau's charitable contributions, which have reportedly gobbled up most his cash. However, Gosling reportedly disagrees, and wants to make sure that if they ever divorce, that they split their funds completely down the middle.  

"Ryan just wants 50/50 all the way, end of story, but it's not as simple as that," the source said. "He can be a master manipulator, and some friends are convinced he's just stalling on the wedding."