It doesn't take long for Wicked Little Letters to set the tone. Within the opening few frames, a puce-faced Timothy Spall has unleashed a volley of invective that would shame a sailor, laying the groundwork for a spectacularly sweary 102 minutes. The formula of revered British thespians serving up more f-bombs than a Gordon Ramsay restaurant means that Wicked Little Letters is undeniably funny. Yet, as each diatribe utilizes ever-more inventive cursing, the movie increasingly feels like a missed opportunity.