In “Blockers,” Leslie Mann plays Lisa, the single mom of a high-school senior named Julie (Kathryn Newton), a vivacious teenager who, as the movie opens, announces a newfound goal of losing her virginity on prom night.
Julie’s best friends Kayla (Geraldine Viswanathan) and Sam (Gideon Adlon) quickly warm to the plan, agreeing that, as with everything else in their lives, they’ll take the leap together — or at least at the same time. When Lisa spies the trio’s texts on Julie’s laptop, she and the other girls’ dads — played by John Cena and Ike Barinholtz — embark on an anxiety-fueled, hysterically pitched mission to scuttle the young women’s plans, invading the kids’ prom night like a battalion of helicopter parents humming “Ride of the Valkyries.