While director Ari Sandel's adaptation is devoid of any surprises and spells out every thought and action, it does finally deliver a worthy message.

Not clever enough to be genre-defining in its own right, The DUFF nevertheless follows successfully in the footsteps of its teen romcom predecessors, delivering both laughs and a genuinely touching romance.

You don't need to be Einstein to see where this is going, but it's an enjoyable and occasionally very funny trip, with some smart observations about the yoof's addiction to technology.

A school comedy so predictable the screenwriters should be sent to the principal's office but with a central performance worth skipping last period for.