We haven't seen a sign of Frankie since she was born last month, but today Drew finally gave us a gorgeous snap of herself holding a sleepy Frankie and big sister Olive, 20 months, her two daughters with husband Will Kopelman.
But of course, Drew, who is well known for her quirky antics, put her own unique spin on motherhood. She introduced Olive with a soft-focus magazine cover portrait back in 2012. This time she showed off baby Frankie while wearing a T-shirt with the slogan 'Mother of Dragons'.
Game of Thrones fans will immediately recognise the slogan as a reference to the character Daenerys Targaryen, nicknamed Mother of Dragons for raising the mythical creatures as her own children.
But this wasn't simply a case of Drew geeking out over her favourite show - proceeds from the sales of the T-shirt, which also comes in a maternity size for future mothers-of-dragons, go to charity.
'Get this Mother of Dragons T-Shirt. All proceeds go to help employment for Foster kids in LA', Drew tweeted below the family photo.
The 39-year-old star of Charlie's Angels and Fever Pitch may have come under fire for 'anti-feminist' remarks in the past, but her choice of wardrobe certainly suggests that she expects her daughters to grow up into confident and empowered women.
And if the shirt is anything to go by, we certainly wouldn't want to get on the wrong side of Drew or her baby 'dragons', no matter how cute they look!