Many stars will present this year Comic Relief
Some of Britain's most beloved television and movie stars appear together on BBC television for the benefit of Comic Relief.
Highlights of this year include One Red Day and One Wedding – Richard Curtis' mini-sequel to his hit film Four Weddings and a Funeral.
Louis Tomlinson, star of One Direction, is out of his expected performance following the sudden death of his sister.
The latest edition of Comic Relief in 2017 raised more than £ 76 million to help vulnerable people in the UK and around the world.
The Charity Telethon, set up by Lenny Henry and Richard Curtis, is broadcast on BBC One every two years.
Henry is one of the hosts this year, as are David Tennant, Zoe Ball, Emma Willis, Romesh Ranganathan, Paddy McGuinness and Alesha Dixon.
Here are some highlights of the night:
Mamma Mia: We're still going
Jennifer Saunders takes the place of Meryl Streep with Alan Carr's help
This parody of the Abba musical suite is written by and performer Jennifer Saunders.
Ten years after Saunders sent Mamma Mia's first film for Comic Relief.
The cast includes a host of celebrities, including Alan Carr (in the role of Harry Colin Firth), Gemma Arterton (in the role of Young Donna Lily James) and Sue Perkins (as a producer of the film).
You can see Carey Mulligan (as Sophie of Amanda Seyfried) interacting with Miranda Hart, who plays the role of the director, right here.
A red nose day and a wedding
What will become of the characters a quarter of a century later?
Following on from his successful success at Four Weddings and a funeral by Richard Curtis – titled A Day of the Red Nose and a Wedding – has been heavily coached and eagerly awaited.
Curtis wrote the script for the short film and Mike Newell returned to the film.
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Media LegendWatch Hugh Grant and Lady Kristin Scott Thomas in the Four Weddings Suite
Most of the original actors are back and will be joined by new faces, including actress Lily James, Good Morning's British Susanna Reid and a mysterious wedding singer.
Richard Madden returns to Bodyguard
David Budd (Richard Madden) of Bodyguard has a new assignment
He did not do the best job possible to take care of the home secretary in BBC One 's hit thriller, but Bodyguard' s David Budd (Richard Madden) is back in the band. action for Comic Relief. This time, his mission is to protect the red nose.
Madden will be joined by Bodyguard co-stars Gina McKee and Vincent Franklin and comedian Sanjeev Bhaskar with a screenplay written by Bodyguard creator Jed Mercurio.
Alan Partridge takes the streets of Norwich
Alan Partridge (Steve Coogan) to participate in fundraising efforts
Steve Coogan's feature comedy, Alan Partridge, looks good. The North Norfolk Digital DJ is the new presenter of This Time from BBC One.
He hopes to capitalize on his return to television as he tries to raise funds in the streets of Norwich with his faithful sidekick Simon Denton (Tim Key).
Comic Relief Does University Challenge
Darren Harriott, Vick Hope and Jason Manford team up for a special edition of the University Challenge
Comic Relief moves to BBC Two at 22:00 GMT, where a special edition of University Challenge will take place.
Guest host, David Baddiel, will be offering tickets for 10 to celebrities such as Emily Atack, Martin Freeman, Kerry Godliman, Darren Harriott, Vick Hope, Jason Manford, Luisa Omielan and Judge Rinder.
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Tom Bennett (Del Boy), Paul Whitehouse (grandfather), Ryan Hutton (Rodney) and the cast of Only Fools and Horses: The Musical will sing
Viewers will watch the performances of actors from Only Fools and Horses: The Musical and Magic Mike Live.
In addition, the casting of Mischief Theater will perform a live magic trick.
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The stars are "exhausted" and "feel nauseous" after 16 hours of non-stop dancing
Claudia Winkleman and Tess Daly have already amassed more than one million pounds sterling with their 24 hour danceathon, and nine celebrities climbed Kilimanjaro for the cause.
But the event of this year has not been without controversy during the preparation.
Presenter and winner of Strictly Come Dancing Stacey Dooley sparked criticism from MP David Lammy after his trip to Uganda to report on the work of Comic Relief in this country.
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David Lammy had a public dispute with Stacey Dooley during his trip to Uganda
The Labor MP for Tottenham said that she had been portrayed as a "white savior", who "sends a distorted image of Africa that perpetuates an old idea of the colonial era".
In response, Comic Relief thanked Dooley for making a film in which "people working with or supported by Comic Relief projects tell their own stories in their own words".
Meanwhile, students from a school in Cardiff decided not to wear red noses take a stand against the use of plastic. Instead, Ysgol Treganna's children painted their noses red.