"They loved it! And they now think Poppy's an astronaut," Mendes said of the couple's two children -- 4-year-old Esmeralda and 2-year-old Amada. "We haven't corrected them yet."
While Mendes has enjoyed a long and fruitful career as an actress and has found another passion creating exciting clothing lines and accessories, she says fame and her career haven't changed the way her kids see her at all.
"I'm just Mom to them, and they never see me get ready for anything," she explained. "It's very important for me for them to see me as just Mom, and I'm just, you know, a messy mom. When I go out with them, I really don't put an emphasis on how I look -- not yet."
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EXCLUSIVE: Eva Mendes Explains How Her Personal Style Has Changed Since Becoming a Mom
However, when it comes to her designs, the multi-talented star is the epitome of chic and stylish, and her newest collection incorporates elements of classic fashion and style motifs from the 1970s.
"I'm kind of obsessed with the '70s right now and so that was a big inspiration," Mendes said. "I was born in the '70s, but I didn't get to take advantage of the fashion at the time, 'cause I was just born. But I thought it'd be fun to kind of revisit that time when my mother was so cool and elegant."