As ticket sales for Dwayne Johnson's San Andreas cool off a little, two very different films are vying for the number-one spot this week: the third (but probably not the last) instalment of the Insidious horror series, and Melissa McCarthy's crime comedy Spy. And they're neck and neck after one day in cinemas according to Box Office Mojo - Insidious has made $10.4million, while Spy is slightly behind with $10.25m.

Lin Shaye at a screening of Insidious: Chapter 3Lin Shaye (the one on the right)

The directorial debut of actor-writer Leigh Whannell, Insidious: Chapter 3 has received a warmer critical reception than many people expected, but its opening-day haul is roughly half what the second film in the series made in its first 24 hours, meaning it will likely end the weekend with a considerably lower total than Chapter 2's $40.3m. 

More: Read our review of Insidious: Chapter 3

A prequel set before the haunting of the Lambert family, Chapter 3 reveals how gifted psychic Elise Rainier (a brilliant Lin Shaye) reluctantly agrees to use her ability to contact the dead in order to help a teenage girl before it's too late.

But are audiences beginning to tire of the supernatural horror genre? The recent Poltergeist reboot hasn't exactly broken any box-office records. Spy, written and directed by Bridesmaids hitmaker Paul Feig, could even end up snatching the top spot from Insidious as the weekend goes on. In the film, Melissa McCarthy plays a desk-bound CIA analyst who volunteers to go undercover to infiltrate the world of a deadly arms dealer and prevent a global disaster.

More: Read our review of Spy

As for the rest of the Friday top 5, San Andreas is at number 3 with $7.7m, the long-awaited Entourage movie is at 4 with £3.7m (it opened on Wednesday) and Pitch Perfect 2 is at 5 with $2.6m.

Watch the trailer for Insidious: Chapter 3 below: 

Watch the trailer for Spy below: