Credit: Lisa Rose/Disney Parks via Getty Images

No sibling rivalry here! Unlike some famous siblings, Camila Alves says her son Levi and daughter Vida rarely fight.

"They're best friends. Levi's a really good big brother," Alves, 29, told Us Weekly at the Swarovski Crystallized Celebrates Brazilian Style event in NYC Tuesday. "They're buddies."

Though Alves believes her two children with partner Matthew McConaughey are "a mix of us," she acknowledges that Levi, 3, is "more like Matthew and Vida is more like me."

Vida, for example, "is very giving," Alves told Us. "If you ask her, she'll give. But if you take it from her, she'll be very upset. She gets very mad. So I'm a little like that. I'm very giving, but if you come and take stuff from me, I then become a big lioness."

The model -- who has been with McConaughey, 41, since 2006 --added that she loves "everything" about being a mom to Levi and Vida, 19 months.

"You create a sense of yourself that you didn't even know you had in you," Alves told Us.