At the age of 10, Black-ish star Marsai Martin approached the TV show’s creator, Kenya Barris, with an idea for a film. After watching the Tom Hanks-starring Big, in which a child becomes trapped in his own adult body, Martin decided she’d like to make a version that featured an adult trapped in the form of their younger self. So she did; at 14 years old, Martin is thought to be the youngest person to executive-produce a Hollywood film.

Martin is “Little” Jordan Sanders, the gawky, glasses-wearing version of her glamorous, cut-throat, 38-year-old CEO self (played by Regina Hall). Martin steals every scene as a grown woman in a child’s body, suppressing cravings for rosé wine, flouncing in miniature pantsuits and referring to herself as “the new alpha of the class” when she’s inevitably sent to school.

Directed by Tina Gordon Chism, co-writer of What Men Want, the film is cute enough, even if key ideas aren’t especially novel: it’s lonely at the top; we need to connect with our inner child; everyone is insecure as a teenager. It becomes more appealing when its jokes are specific. “That’s my struggle!” complains one of Jordan’s tech bro clients, whose father “only” invested $5m in his company, a cheery, satirical swipe at white men unaware of their own privilege. Also amusing is Jordan’s latest product, a virtual assistant called HomeGirl, like Alexa only with better taste in music and voiced by Tracee Ellis Ross.