He was linked with a move to China in January but stayed with Rangers and has now given them a further boost ahead of Sunday's Old Firm game, which is live on Sky Sports, by signing a new contract.
Just three months after that 2012 win, 54-time Scottish champions Rangers were liquidated following financial mismanagement.
Boyata last played against Kilmarnock on February 3 while Armstrong has been out since the goalless draw against Rangers at Celtic Park on Hogmanay.
He said: "We are delighted that Alfredo has committed his future to the club today".
"But we've gone there three times before and performed very well.
Real Madrid win ahead of key Paris game
Ronaldo now has 14 goals in his last eight appearances, form which Zidane said the team had to use to their advantage. The Real boss said: "He's going to be in Paris and I'm very happy because he is going through a very good moment".
We're still chasing them and whether we chase them down or not won't just be on this one game - it will be on the games after it, so we have to make sure that what we do, from Sunday, is put ourselves in as good a position as possible but we have to continue our improvement, because we're not the finished article as yet".
Celtic have some superb attacking players, such as Scott Sinclair, James Forrest and Moussa Dembele, and it will be interesting to see how Bates copes.
"They will look to play better than what they did in the last pressure game that they had which was against Hibs, when Hibs played very well and won the game".
"Dedryck [Boyata] is back, been training really well, so he's available".
His season on loan in the Finnish capital was equally impressive as he netted 30 goals in 43 games, with four of them coming in the Europa League qualifying round.
High of 48 with strong winds in Longmont today
A winter storm watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Windy, with a west wind 11 to 16 miles per hour increasing to 23 to 28 miles per hour in the afternoon.
Italians voting in general election
Italy's election "epitomizes everything, it is pure populism", Bannon said in an interview with The New York Times last week. If there is no new majority in Parliament, Mr Paolo Gentiloni of the Democratic Party would remain as prime minister.
Nintendo Direct Airs Tomorrow; Showcases New Nintendo Releases
We'll likely get a bunch of indies, a first party game or two ( Mario Aces Tennis), and some other third-party games to boot. Here's hoping that these announcements are particularly awesome as a way of celebrating the Switch's one year anniversary.
Putin praises Trump but pans US politics
The former KGB agent promised he hadn't tried to "turn" Melania Trump, "no, I stopped doing that a long time ago". If there is this decision to destroy Russian Federation then we have a legal right to respond'.
XXX Star Stormy Daniels Files Lawsuit Against Donald Trump
The growing scandal between President Trump and adult entertainer Stormy Daniels (nee Stephanie Clifford) has intensified. Reached by phone, Daniels' lawyer Michael Avenatti told USA TODAY: "Yeah, and he also won the popular vote".
Jordan Peele opens up about historic win at 2018 Oscars
Is Peele ready to cash in even more with a " Get Out 2"? This year's Academy Awards was a bit different from those in the past. Get Out creator Jordan Peele won the Oscar for Best Original Screenplay Sunday night, and everyone was elated.
Allison Janney Says 'Mom' Will Keep Her Grounded After Oscar Win
Asked if her day-to-day life might change now that she's an Oscar victor , Janney said she had to go right back to work at 10 a.m. Asked what her inner-critic, which she has previously said she uses to guide her, would say to her now, Janney said: "Bravo".