This movie is surprisingly sweet, bright, and optimistic in all the right places.

There's a power in seeing a self-aware black woman on screen who simply proceeds through life like she hasn't been defeated by it, like she still feels she can make a difference, like she still believes that the world is hers.

A 27-year-old comedian and Daily Show correspondent given ample room to breathe, riff and roar by director Jim Strouse's script, Williams bounds into the proceedings with unfiltered comic peculiarity.

Williams was actually a former correspondent on US programme The Daily Show, but has successfully made the tricky jump to acting look easy. Watch for the chance to see a young actor clearly destined for stardom.