What's on this weekend in London

Hundreds of gorillas will run through central London on Saturday. Photo: PA

Look out for hundreds of gorillas in London this weekend.

The fun runners will climb into hairy suits and set off on a 7km course to raise money for projects helping protect gorilla habitats.

Good spots to see the run are the South Bank and Tower Bridge.

More info at http://www.greatgorillarun.org/

This weekend is your chance to see the interiors of historic buildings. Credit: PA

Open House is held once a year and gives you the chance to see the inside of private buildings.

Venues include majestic homes, historic office buildings and roof gardens.

One site open this weekend is 120 Fleet Street, which has been restored to its 1930 splendour and is the former headquarters of the Daily Express.

More info at http://www.londonopenhouse.org/

Hundreds of people are expected to turn out in Stratford on Saturday, attempting to break the world record for the largest gospel choir in the world.

The University Gospel Choir of the Year is made up of young people and aims to spread messages of hope, one year on from the riots.

Some singers performed on London Tonight. Watch the video above.

Brad Pitt poses at the London premiere of 'Killing Them Softly' Credit: PA

If cinema is your thing, then you can catch Brad Pitt's latest film.

'Killing Them Softly' is out today - it's a gritty crime drama set in New Orleans in 2008.

It's rated 18.