BBC One will broadcast live coverage of seven Six Nations matches on BBC TV, iPlayer, online and mobile app.
Starting on Sunday, 7 February with Wales v Ireland, the BBC will show Wales, Scotland and France home games.
There will be live text coverage, reports and video highlights of every match on the BBC Sport website and app, plus in-play highlights of BBC games.
BBC Radio 5 Live or Sports Extra will bring you commentary of every match involving a home nations team.
You can also download the Rugby Union Weekly podcast every Tuesday from the BBC Sounds app to hear hosts Danny Care, Ugo Monye, Chris Ashton and rugby correspondent Chris Jones debate the big talking points, while Matt Dawson's Rugby Show returns on Radio 5 Live to preview every round of games.
Matt Dawson will also offer his take on events in a weekly column published on the BBC Sport website.
England won the delayed 2020 Six Nations on points difference from France.
Which matches are on BBC TV and iPlayer?
After showing Wales v Ireland on the opening weekend, BBC One and BBC iPlayer will bring you six other games:
Former France and Leicester hooker Benjamin Kayser joins the TV team, while former Wales and British and Irish Lions captain Sam Warburton returns to a line-up that also features Martin Johnson, Jamie Heaslip, John Barclay, Jeremy Guscott, Jonathan Davies, Chris Paterson, Thomas Castaignede, Andy Nicol and Brian Moore.
There will be a one-hour Six Nations Rugby Special on BBC Two on 14 February for fans to catch up on all the latest highlights from the Championship.
When does live radio commentary start?
The BBC's live radio and online coverage starts on the opening day of Saturday, 6 February with Italy v France followed by England's Calcutta Cup clash with Scotland.
There will also be additional coverage and analysis across BBC Wales, BBC Scotland and BBC Northern Ireland. All Ireland games will be live on BBC Radio Ulster, all Scotland games will be on BBC Radio Scotland, and all Wales games will be on BBC Radio Wales and BBC Radio Cymru.
How to follow on social media
BBC Sport's various social media accounts will provide all the latest breaking news stories and most sharable clips from the tournament. Follow BBC Sport on Facebook, Instagram, Twitter and TikTok to get your rugby union fix.
What about the women's tournament?
The 2021 Women's Six Nations has both been postponed to a date yet to be announced.
Fixtures and full BBC coverage times
All times are GMT. Fixtures and event start times are subject to change. The BBC is not responsible for any changes that may be made. Coverage on BBC Red Button can be subject to late schedule changes.
Saturday, 6 February
13:15-13:45, Eddie Butler's Six Nations, BBC One and BBC iPlayer
14:15-16:15, Italy v France, Radio 5 Live Sports Extra & ITV
16:45-18:45, England v Scotland, Radio 5 Live & ITV
Sunday, 7 February
14:00-17:15, Wales v Ireland, BBC One, BBC iPlayer & Radio 5 Live Sports Extra (from 15:00)
17:10-17:30, Six Nations Forum, BBC Red Button & online
Friday, 12 February
21:00-22:00, Matt Dawson's Rugby Show, BBC Radio 5 Live
*further dates to be added once confirmed
Saturday, 13 February
14:15-16:15, England v Italy, Radio 5 Live Sports Extra & ITV
16:00-19:10, Scotland v Wales, BBC One, BBC iPlayer & Radio 5 Live Sports Extra (from 16:45)
19:05-19:20, Six Nations Forum, BBC Red Button & online
Sunday, 14 February
15:00-17:00, Ireland v France, Radio 5 Live Sports Extra & ITV
18:00-19:00, Six Nations Rugby Special, BBC Two and BBC iPlayer
Saturday, 27 February
14:15-16:15, Italy v Ireland, BBC Radio Ulster & ITV
16:00-19:10, Wales v England, BBC One, BBC iPlayer & Radio 5 Live (from 16:45)
19:05-19:30, Six Nations Forum, BBC Red Button & online
Sunday, 28 February
14:00-17:15, France v Scotland, BBC One, BBC iPlayer & Radio 5 Live Sports Extra (from 15:00)
17:10-17:30, Six Nations Forum, BBC Red Button & online
Saturday, 13 March
14:15-16:15, Italy v Wales, BBC Radio Wales, Radio Cymru & ITV
16:45-18:45, England v France, Radio 5 Live & ITV
Sunday, 14 March
14:00-17:15, Scotland v Ireland, BBC One, BBC iPlayer & Radio 5 Live Sports Extra (from 15:00)
Saturday, 20 March
13:45-16:30, Scotland v Italy, BBC One, BBC iPlayer & BBC Radio Scotland
16:45-18:45, Ireland v England, Radio 5 Live & ITV
19:15-22:25, France v Wales, BBC One, BBC iPlayer & Radio 5 Live
Catch-up
You can view BBC Sport output and listen to our radio sports programming on BBC iPlayer and BBC Sounds.
The BBC Sport website is available via desktop, mobile, tablet and app, giving fast and easy access to the live stream, text commentaries, news, reports, schedules and videos, as well as highlights of the day's action. The BBC Sport app is available free on Apple and Android devices.
National and regional variations
National and regional variations have been included in this list where possible, but please check your local listings for more detailed information.