The baptism saga continues. Prince Harry and Duchess Meghan's daughter Lilibet turns 4 months old in just a few days, but her parents reportedly still haven't decided if she will be christened in London or the United States.

Lilibet's baptism: Meghan and Harry reportedly disagree

An insider has told In Touch Weekly that the couple recently argued about the whole baptism matter. Meghan is apparently insisting that Lili — like her brother Archie — should have a royal baptism in London.

According to the insider, the Duchess wants the royal ceremony in the event that their children one day receive the titles of prince and princess. But Harry is against the UK trip.

He reportedly thinks it's too soon to pretend like nothing happened with his family, so he prefers a small ceremony in the US. "Harry initially expressed doubts – it turned into the worst argument they ever had," the insider said.

Prince Harry called off a trip to England?

The quarrel is supposed to have occurred during the couple's New York trip last week. After that, they were planning to travel to England, but ultimately decided against it for the moment, according to the In Touch source.

Duchess Meghan and Prince Harry

Meghan is said to have been pretty upset that Harry didn't agree with her. He apparently even had to dine alone on one of the evenings in New York.

But, per the report, the couple made up and apologized before returning home this past weekend. But it seems this will be far from the last word on Lilibet's baptism.