When Slim has a monologue in the car and Gracie is sleeping, actress Tessa Allen was actually asleep. The filmmakers tried to film while Tessa was awake, but it was hard for the young actress to keep her eyes completely still for the hour it took to film. Instead, they waited until she had a nap, and her mum picked her up and brought her into the car.
The fighting technique learned by Slim is Krav Maga ("contact combat") the Israeli self defense technique.
Michael Apted was initially wary about working with Jennifer Lopez, as he had heard rumors that she was a diva. However, he found her to be completely professional throughout the shoot.
When Gracie's basketball hits her foot and rolls away, actress Tessa Allen did that in one take. The sky and lighting were changing and they needed to get it in one day, because the cast and crew were changing locations the next day.