The young actress who played Robert Downey Jr.'s daughter in "Avengers: Endgame" is asking people on social media to stop bullying her. In a plea posted on Instagram, 7-year-old Lexi Rabe asks people to not be so mean. Her mom, Jessica, wrote on Instagram in part, "Please keep your opinions to yourself so Lexi can grow up in the free world. She's a normal human being and she's a child." InsideEdition.com's Stephanie Officer reports on the incident that triggered the plea.