Television's superhero series Supergirl as a young Kara Zor-El, played as an adult by Melissa Benoist. In 2015, Weissman appeared in the CBS and Warner Bros. She made her film debut playing the role of a young April O'Neil in the science fiction action comedy film Teenage Mutant Ninja Turtles, the role played as an adult by Megan Fox, in 2014.
As an actress, she has appeared in commercials for ACT mouthwash, Maybelline, Purell, and My Little Pony. She has appeared in major designers and brands like Calvin Klein, Ralph Lauren, Levi's, Benetton, DKNY, H&M, among many others.
She started her career as a model at the age of eight, following in the footsteps of her mother whose agency discovered her. Weissman is a New York City-based model and actress.