Revellers are set to descend on Henham Park for a weekend of music, theatre and comedy at Latitude Festival.

Now in its 13th year, the entertainment extravaganza near Southwold continues to grow in popularity, with about 40,000 expected to pitch their tents and enjoy the sound of headliners Solange (9.30pm, Friday), The Killers (9.30pm, Saturday) and alt-J (9.30pm, Sunday).

The festival's booking of the Vegas outfit for its Saturday slot represents quite the coup, with the four-piece accustomed to rocking some of the world's biggest and most famous stadiums.

Also featuring in the main Obelisk Arena are indie legends The Charlatans (6.10pm, Friday), songstress Jessie Ware (6.10pm, Saturday) indie legends The Charlatans, and the booming voice of Rag'n'Bone Man (6.10pm, Sunday).

Elsewhere, fans of one of the nation's favourite panel shows are in for a treat as Sandi Toksvig and Alan Davies present a special live edition of QI on Friday at 11.05am, flanked by a host of celebrity panellists.

Those in search of a laugh can also head to the Comedy Arena for stand-up from Bridget Christie, Harry Hill, Dylan Moran and countless more.

The question on everybody's lips, though, is who will be the weekend's secret act?

Liam Gallagher, Snow Patrol and Suffolk superstar Ed Sheeran are among those in the running if the rumour mill is to be believed, but organisers are remaining tight-lipped until the momentous appearance arrives.

A festival spokesman said: 'Our secret act is iconic and certainly a big name. What we can say is that this is one of the biggest secret acts we've ever booked.'

Despite the bulk of the entertainment taking place from Friday to Sunday, thousands will be arriving at the country estate tomorrow to beat the crowds. Both the car park and the campsite will open from 2pm on Thursday and won't shut until 1pm on Monday, July 16.

Organisers Festival Republic say they have improved their traffic plans for this year in a bid to manage the huge volume of vehicles heading towards the venue. Motorists have been urged to abide by local signage to ensure a smooth traffic flow.

Visit the Latitude website for further details about the festival including times, ticket information, travel advice and entry restrictions.