The seven-hour marathon show will feature some of the UK's top names from the world of TV, music and theatre.
Highlights include a sneak preview of the Doctor Who Christmas episode and a special performance from the stars of Strictly Come Dancing.
Another treat on the night will be the regular headline-grabbing performance by the BBC newsreaders. This year, Fiona Bruce, Sophie Raworth, Sian Williams, Kate Silverton and Susanna Reid are taking their most risque Children in Need challenge yet - a booty-shaking Beyoncé dance routine. The five will sing and dance live tonight to the singer's hits Crazy in Love and Single Ladies.
An special edition of Lark Rise to Candleford will also see Sir Terry make a guest appearance at the village Post Office. The Dragons' Den team will don hard hats and overalls to help renovate a Children in Need community centre in London, while the cast of The One Show, including Christine Bleakley and Adrian Chiles will recreate Fame.
Meanwhile, Gary Barlow, who rocked the Royal Albert Hall in aid of Children in Need, promises to raise the roof - and the total when he brings on a big cheque during the night.
The show will also see a musical extravaganza from Albert Square and the cast of EastEnders, with a Motown celebration.
Other contributions will come from the cast of Merlin, Casualty and top TV detective Poirot, with live performances from the cast of The Bill performing a Rat Pack classic and Hollyoaks actors rocking fans with a medley of Queen's greatest hits. JLS, Pixie Lott, Taylor Swift, Alesha Dixon, Spandau Ballet, Paolo Nutini, Cheryl Cole, Little Boots and the Nolans will also perform.
Organisers will be hoping to emulate the success of last year's broadcast, which raised more than £21 million on the night, with the 2008 total eventually topping £38 million.
Comedian Peter Kay, who had a smash hit with (Is This The Way To) Amarillo, has brought together almost 100 famous faces from around the world to create this year's official single.
The animals from Walk on the Wild Side will star in a Children in Need special sketch, and stars of the West End will be live in the studio, including Jason Donovan with the cast of Priscilla Queen of the Desert. Justin Lee Collins will perform a live version of a Tom Jones classic, and the Around the World in 80 Days partners, John Barrowman and Myleene Klass, are set to duet live in the studio.
Throughout the evening there will be special appeal messages from a host of celebrities, including Lewis Hamilton and Lady Gaga.
The programme will also feature broadcasts from around the UK, as BBC presenters join their local communities to catch up with some energetic and creative fundraising exploits.
Copyright Speakers Corner 2017