It's Red Nose Day, which means only one thing: rip-roaring laughter and top telly treats, presented by TV favourites Lenny Henry, Fearne Cotton, Graham Norton, Jonathan Ross and Claudia Winkleman.

Highlights include a feast of unmissable sketches from the likes of James Corden, the cast of Outnumbered, Miranda Hart, Harry Hill, Steve Coogan and Armstrong & Miller.

There are also Comic Relief specials of Masterchef and The Choir and unforgettable music performances from some of the biggest names in the industry. The night is sprinkled with plenty of reminders of why it's all happening: to raise money to change the lives of extremely vulnerable and disadvantaged people in the UK and Africa.

Get your credit card out, make the phone call, pledge the money. Then you can sit back, guilt-free, and enjoy the funniest evening on telly since oooh, probably the last Red Nose Day. Anyone who's anyone from the world of comedy is on BBC TV tonight. There's funny stuff by Lenny Henry, Graham Norton, Peter Kay, Harry Hill and James Corden, and a road trip in the company of The Inbetweeners around the rudest places in Britain. There's also a mini episode of Doctor Who featuring two Amy Ponds, a special edition of Outnumbered and a Downton Abbey spoof. Adele sings live, and in a celebrity MasterChef Miranda Hart and Claudia Winkleman go head to head, which ought to be a physical impossibility. We also get a special version of The Choir, Gareth Malone's foolhardy bid to get celebrity chefs to sing Rick Astley's Never Gonna Give You Up. In between all this are sobering film clips reminding us what it's all about and a ten-minute edition of EastEnders resolving the disturbing story about teenage prostitution.

Comic Relief's 10 best moments

What are your favourite funny bits from Red Nose day? We start you off with our most memorable 10.

Chris Moyles sets new radio record for Comic Relief

DJ Chris Moyles has set a new world record by staying on air for more than 50 hours.

Audio: Enfield in Downton Abbey spoof for Comic Relief

It's Red Nose Day on Friday and the TV show begins tonight on BBC1.

BBC Radio 5 live Breakfast spoke to Harry Enfield who told Nicky Campbell and Shelagh Fogarty about the special spoof Uptown Downstairs Abbey he's starring in alongside Jennifer Saunders, Joanna Lumley and Kim Cattrall.

Comic Relief 2011: viewers' guide

What's happening when during tonight's Comic Relief charity marathon on the BBC.

James Corden on how he bagged a Beatle for Comic Relief

James Corden is told that Sir Paul McCartney would like to speak to him. "Yeah. OK," he says, outwardly quite cool, inwardly all over the place. Then, a few days on, he hears that the former Beatle will call him shortly.

Ronni Ancona joins Comic Relief's desert trek in Kenya

My involvement with Comic Relief over the past 10 years has always been in a comedic capacity, but I'd always wanted to visit one of the regions where they spend the money that's raised. I was asked if I'd like to join a group of celebrities trekking 107 kilometres across the Kaisut Desert in Kenya to raise awareness of the urgent eye care needed there and the millions of Africans who are at risk of losing their sight because of preventable and treatable conditions.

Video: Alan Partridge does Comic Relief sketch

Steve Coogan's spoof DJ character releases preview clip of sketch to be shown on Red Nose Day, BBC One.

Worst Red Nose Day sketches ever

They were all in a good cause - but these five embarrassing Red Nose Day sketches leave us with red faces.