Just call her North West: Diva-in-Training!

According to a new report, the two-year-old is not adjusting well to the arrival of her baby brother, Saint West — and it's giving parents Kim Kardashian and Kanye West a real headache!

RELATED: See North West's 2015 Hair Evolution!

"North has been throwing some serious tantrums and Kim and Kanye do not know what to do," an insider reveals. "They have consulted a family therapist to learn how to deal with this."

north west
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It's been less than two weeks since the birth of her sibling, but already "North's tantrums are becoming a serious problem," the source shares.

"She is not reacting well to how much attention he is already getting from the rest of the family," the source tells Radar Online. "North is used to being the center of attention and daddy's little girl. The birth of Saint has been really, really hard on her."

RELATED: Kim Kardashian Slams North West Hater On Twitter — "Learn How to F–king Spell"

The famous tot is no stranger to outbursts. She's been photographed throwing a fit everywhere from the front row during Fashion Week to the streets of NYC.

See her most memorable ones in the gallery below!