It looks like Hailey Baldwin and Justin Bieber may have had a slight disagreement after lunch on Tuesday as they were pictured having what appeared to be a row in the street.

The pair dined at Casa Del Sol in LA along with Hailey's dad, Stephen Baldwin, but it seems something went down in the restaurant that caused things to get heated.

Usually, we only argue before we've been fed, so we can't even put this one down to hanger.

Stephen was snapped comforting his 24-year-old daughter as he appeared to act as a mediator between the two suspected newlyweds.

He then reportedly headed over to Justin to give him a talk before actually smacking him on the butt.

Lord knows what they were actually arguing about, but we're living for Hailey's dad acting as the discipline dishing adult in the scenario.

And if rumours are to be believed, this will probably be one of many more arguments in Hailey and Justin's marriage as they've apparently already committed to "for better or for worse."

(Not saying marriage is all about arguments, but it does happen y'know).

It's worth pointing out that the pair were all smiles before they entered the restaurant, so this could easily be a case of the pictures telling a different story. But videofootage does show things looking pretty frosty between them.

Here's hoping they managed to smooth things out, and Stephen isn't put off taking the son-in-law out for lunch forever.