THE LADY VANISHES

She contrasts sharply with Blake Lively’s lost matriarch, who makes her entrance in lustrous slow motion, strutting elegantly beneath an umbrella during a downpour, dressed in a pinstripe trouser suit. Sharzer’s script is pleasingly self-aware as it references classic thrillers to keep us guessing as to the spouse’s whereabouts. Thirty-something widow Stephanie Smothers (Kendrick) is devoted to her young son Miles (Joshua Satine) and she volunteers for every after-school activity. One day, Miles pleads with his mother to invite best friend Nicky (Ian Ho) over for dinner.

Nicky’s mother turns out to be impossibly glamorous PR director Emily Nelson (Lively), who masterminds global campaigns for self-absorbed fashion designer, Dennis Nylon (Rupert Friend).

Emily takes a radically different approach to parenting and she shocks Stephanie by telling Nicky that it isn’t convenient to spend the afternoon with Miles because, “mummy already has a playdate with a symphony of anti-depressants”.

Unexpectedly, Stephanie befriends Emily and she meets the PR doyenne’s husband, Sean (Henry Golding).

When Emily calls one afternoon and asks Stephanie to pick up Nicky from school while she deals with an emergency, Stephanie gladly obliges. The publicist never returns to collect her son and Stephanie alerts the police.

A Simple Favour ricochets merrily between dark personal confessions and energetic verbal sparring as Stephanie discovers she didn’t know her best buddy at all.

Feig shows a deft touch behind the camera and he elicits winning performances from the female leads.

Golding, recently seen in Crazy Rich Asians, is dreamy in underwritten support and Andrew Rannells is a hoot as one of the other parents, who observes Stephanie’s energy with disdain and jealousy.