Sibling rivalry. North West 'not happy' with the arrival of Saint

With a perfect side-eye and some serious sass, North West is said to be less than impressed with the arrival of her brother Saint.

In fact, a source close to Kim Kardashian and Kanye West say two-year-old North "does not seem happy" about the tot arriving back at the family's LA home.

"North already seems incredibly jealous of him because she is so used to being her mother’s only one," the source added.

Five days in and the sibling rivalry is already firmly in place. We knew that was going to happen.

But the source adds that expect for North's unhappiness, the family are settling back into normal life. Well, as normal as life can be for a Kardashian.

"Everyone says that, like North, Saint has Kim’s attractive features," the insider told Radar. "Even Kim and Kanye were hoping for that."

Kim, 35, gave birth to her and Kanye's son on Saturday, revealing the news on her website Kim Kardashian West.

Then on Monday, she broke the internet again by revealing they were calling him Saint. Unsurprisingly, Twitter exploded with criticism at the name.

We wouldn't be surprised if North - who is reportedly a whiz on her iPad - was leading the social media backlash.

Check out the sassy tot below, telling paps where to go.