Fans, politicians and others took to social media sites to congratulate Celtic after Neil Lennon's team secured the club's 44th league title.
The East End of Glasgow witnessed joyous scenes as fans celebrated their side's comprehensive 4-1 defeat of Inverness Caledonian Thistle to clinch their second successive Premier League title.
The parties continued for hours and Celtic-supporting pubs were expected to do exceptional business.
The result at Celtic Park meant all of Scotland's senior football leagues have been won with several weeks of the season remaining.
Only Dumfries-based Queen of the South prevented a Glasgow clean sweep of the league titles, by winning the Second Division.
Partick Thistle took the First Division title while Rangers, who were relegated to the bottom tier after their financial collapse last year, won the Third Division.
The only trophy to be decided is the Scottish Cup, which will be won by Celtic or Hibernian.
Lennon said: "Winning the league is a very special moment, I want the players to enjoy it. It's a privilege to manage this club and to win this championship again.
"I'm so proud for the players and the fans – they're the people who make this club what it is."
First Minister Alex Salmond tweeted: "Congratulations @OfficialNeil and to everyone at @celticfc on retaining the Scottish Premier League championship title."
Shay Given, the Aston Villa and Republic of Ireland goalkeeper, tweeted: "Congrats to everyone @celticfc crowned SPL champions again."
Meanwhile, Motherwell FC sent a congratulatory tweet, saying: "Congratulations to @celticfc on winning the Clydesdale Bank #SPL title this afternoon.
Paul Maskey MP tweeted: "Well done Celtic. Champions again." Lennon himself tweeted to his 189,265 followers: "Fantastic feeling, thank you for all your support. Players and fans were magnificent today."
Many ordinary Celtic fans took to the micro-blogging site to express their delight. Said one: "Took my daughter to her first Celtic match today. Missed Lenny's arrival on field to beat the crowds. Still worth it to see the champions."
Wrote another: "Thanks to Neil Lennon and the Bhoys, cheered my brother up, poorly in hospital at the mo. Much more to come!"
From Pennsylvania, USA, one Celtic fan wrote: "Another year Another title. Seven years since I found you Celtic and this American's life has not been the same. Champions of Scotland."
Russell Leadbetter
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules hereComments are closed on this article