Motherhood is fantastic for Margot Robbie .

More than nine months after giving birth to a baby boy with husband Tom Ackerley , the Barbie star is relishing her new life as a parent. So much so, she's having a hard time putting her joy into words.

"It's funny, you try to explain to someone who has kids, you don’t need to because they get it," Margot told Entertainment Tonight in a video published Aug. 20. "And if they don’t, it’s probably just really boring to hear."

She added of being a mom, "It's the best."

While Margot hasn't shared much about her son, including his name, she's taken the title of being her little one's mother to heart. In fact, the 35-year-old—who married Tom in 2016—was spotted wearing a gold chain necklace reading "mama" during some downtime in her

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