David Jonsson, the fast-rising British star of “Alien: Romulus,” “Rye Lane” and “Industry,” has joined Phoebe Arnstein’s short film “If You’re Happy” as executive producer.

Starring “The Crown” alumnus Erin Doherty (soon to be seen in Disney+ series “A Thousand Blows”), “If You’re Happy” follows Lotte (Doherty) as she navigates the daunting challenges and demands of early motherhood. Seeking connection, she attends a local baby group led by a bizarre teacher (Jo Hartley). Lotte is further displaced by the surreal environment and uses a childish game to vent her fury, sparking an unexpected, primal outpouring of emotions amongst the other mothers.

“All the things about British cinema. Shot in my hometown — honest, complex simplicity. A story of our time,” said Jonsson, who was recently unveiled as one of Variety‘s 10 actors to watch in 2024.

“’If You’re Happy’ is about the importance of meaningful human connection in a time of crisis,...