Can you guess which one of Beyoncé's twins was born first?

Who's older, Sir or Rumi Carter?

If you went to school with twins, or are one yourself, you'll know that whichever twin is slightly older has the right to laud it over the other for the rest of their lives. It doesn't matter whether they arrived three minutes or three hours before the second twin, they were born first, and that's that.

So we've been dying to know which of Beyoncé and Jay-Z's newborn twins arrived into the world first – Sir or Rumi?

Well, it looks like baby Rumi is the twin with bragging rights over her brother, as E! News reports she was the first of the two to arrive into the world.

However, Sir wasn't far behind her as both twins were born at 5:13am on the 13th June, officially.

Beyoncé confirmed the names of her two new bouncing bundles of joy in an Instagram post earlier this month, after a long wait for details of the twins' birth from the Beyhive.

Since the announcement that almost broke the internet, we've decoded the meaning behind Rumi Carter's beautiful name as well as the significant details of the photo itself.

Hopefully big sister Blue Ivy will be able to step in and prevent too many 'I was born first' arguments between her siblings from escalating.

We don't know about you but this has got us thinking – which one of George and Amal's twins was born first?

Here's hoping that Rumi doesn't brag too much about being the eldest twin.