Millie Bobby Brown's furry companion, Winnie, has been the ultimate 'big sister' in the most unconventional way. After the Stranger Things star and her husband Jake Bongiovi announced the adoption of a baby girl in August, the 21-year-old confessed that her canine companion has been less than thrilled with the new addition to the family.
"It's been a hit to her ego," Millie admitted during a December 7 appearance on The Tonight Show. "I think she doesn't understand it. She hasn't acknowledged her presence yet, but my daughter has totally figured out that she's an animal."

Winnie's reaction is a "power play," according to the young mother. "She's like, 'I'm gonna ignore you until you disappear,'" Millie continued. "I have sit-downs with her, like, 'She's not going anywhere now.'"
But Winnie's jealousy doesn't stop there; she's even started acting out in her quest for attention. "Last night, she took one of my daughter's bath toys and ran it upstairs," Millie shared. "I said, 'I saw you do that,' and she poked her head around the corner and gave me a death stare. She knew exactly what she was doing. She stopped on the stairs to be like, 'Yeah, that's right. What are you gonna do about it?'"
Of course, with motherhood taking over her life, it's natural that Winnie would feel a little left out. "It's been a beautiful, amazing journey—she's taught us so much already," Millie told British Vogue in an interview last month. "Perspective is a huge thing. The smaller things in life are so much more precious. Our days are filled with lots of cuddles, laughter, and love. It's just endless joy."
And when it comes to Jake, 23, he's just as thrilled as Millie is about their daughter. "We are 50-50 on everything," she explained. "That's why I'm so grateful to have partnered with him in this life—he is just the most amazing dad."