His agent told media outlets this afternoon that Briers died "peacefully" at his London home yesterday (Sunday 17th February).
Born on 14th January 1934, Briers first found fame starring in 1960s sitcom hit Marriage Lines, which ran for 5 series from 1963. He played the lead role of George Starling, a young newlywed, with Prunella Scales as wife Kate.
However, it is self-sufficiency sitcom The Good Life for which Briers is now best remembered. He starred as Tom Good, a bored and frustrated office worker who packs in his regular job to raise goats, chickens and pigs, and grow his own fruit and vegetables, with wife Barbara (Felicity Kendal) in the grounds of their suburban home. The hugely popular sitcom ran for four series from 1975.
Richard Briers found success again in the 1980s with Ever Decreasing Circles, also running for four series between 1984 and 1989, in which he starred as self-important family man Martin Bryce whose whole world begins to crumble when a charismatic, relaxed neighbour begins to upset his compulsive behaviour and standing.
He also starred in BBC sitcom Brothers In Law on both television (1962) and radio (1970 - 1972), 1985's All In Good Faith, The Other One (1977) and Goodbye Mr Kent in 1982, amongst many other television, radio and film titles, and many acclaimed stage productions.
In an interview published earlier this year to promote the release of Marriage Lines on DVD, Briers revealed that he had smoked an estimated 500,000 cigarettes before quitting in 2003, and had been suffering with emphysema since 2008.
Richard Briers leaves his wife, Ann, and adult daughters Lucy and Katie.
This Good Life clip shows Tom and Barbara trying out their own home-brewed wine:
The following video is the first part of the very first episode of The Good Life.