"It's exciting and I'm so thrilled for her and really so proud of her," Regina Hall told ET's Courtney Tezeno at the movie's Los Angeles premiere on Monday, insisting that she didn't have any advice for her young co-star as she stepped into the role of producer.
"She was pretty great. She knew what she was doing. It was her vision," she continued. "Once you're on set, you concentrate on acting."
Martin approached Black-ish creator Kenya Barris with her idea for Little on the set of the comedy in 2014, when she was just 10. The movie stars Hall as an overbearing boss who is transformed into a child version of herself, played by Martin. Issa Rae, Justin Hartley, Tone Bell, Rachel Dratch and more also act in the movie.
"It's weird to get your check from a 13-year-old," joked Bell. "No, it's great, it was amazing. I met her 4 or 5 years ago when Black-ish first started. Just watching her grow up and develop into this has been amazing, and even hopping into the film was super fun.... I can't wait to see what she does next."
"She's a boss lady!" Luke James raved. "I think it's the most important thing to acknowledge that idea that this is a young lady who is having these dreams and implementing them and making them happen now, and inspiring, I hope, her own generation and even us right now."
"If you want to put great picture on TV and in the theaters, then do it yourself if you can, and she can. So, I'm honored to call her a boss lady," he added.
Noree Victoria, who plays Martin's mom in the film, called working with her "quite magical." "I wish she were mine," she confessed. "I met her on the set of Black-ish... she's a consummate professional, and very funny, very grounded, very sweet."
Martin credited her parents for keeping her humble. "I think [I stay grounded by] just still trying to me at the same time. Being a 14-year-old girl, I still gotta do chores, homework, and learn life lessons. This doesn't change any of that," she said. "My parents always say, 'This is what I do, this is not who I am as a person.'"