FT: Albion Rovers 0-3 Celtic
Scott Sinclair scores stunning opener
Moussa Dembele adds second, Armstrong with the third
FT: Raith Rovers 1-1 Hearts
Jamie Walker gives Hearts the lead
Declan McManus heads late equaliser
That's all folks. Are you excited by the draw? Can anyone stop Celtic completing a clean sweep?
Join us again on Wednesday when Brendan Rodgers' side take on St Johnstone in the league and Hearts and Raith Rovers meet again in their cup replay.
Holders Hibernian could face Hearts in the Scottish Cup following the draw for the fifth round.
Read MoreCeltic manager Brendan Rodgers on BBC Sportsound
"We had to really work hard to find the space but we had good tempo and concentration.
"Against teams who play that low block, you need to work the ball wide and we didn't do that enough in the first half but Scott Sinclair has got that quality to conjure up a special goal.
"I was pleased with Dedryck Boyata, who hasn't featured as much as he'd liked to. He was flawless. He's fit, strong and fast.
"You're always happy with a home draw and we'll look forward to that when the time comes."
The Hearts v Raith Rovers replay on Wednesday takes on a bit more significance now that Hibernian are lying in wait for the winners.
Hearts looked in charge after taking the lead at Stark's Park earlier today but Rovers came roaring back in the second half to earn a deserved 1-1 draw.
Dunfermline will fancy their chances at home to Hamilton, while League Two duo Clyde and Stirling Albion will just have to beat Ayr United or Queen's Park if they want a money-spinning tie in the last eight.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Judging by his tweet, Hibs striker Jason Cummings is excited after the draw. He scored in both games as Hibs beat Hearts after a replay on their way to winning the cup last season.
A few cracking ties there... Not least a possible Edinburgh derby at Tynecastle.
Ross County v Aberdeen is another good match-up, as is St Johnstone v Partick Thistle.
You can't see Celtic or Rangers slipping up at home but Inverness have cup history in the east end of Glasgow.
Dunfermline v Hamilton
Raith Rovers or Hearts v Hibernian
St Johnstone v Partick Thistle
Ayr Utd or Queen's Park v Stirling Albion or Clyde
East Fife v St Mirren
Ross County v Aberdeen
Celtic v Inverness CT
Rangers v Morton
Ties to be played over 11/12 February
Rod Stewart was well wrapped up as he watched Celtic ease past Albion Rovers this afternoon.
Now he's getting ready to help with the draw. It looks like he's had a few shandies in hospitality, so it could be interesting.
Image source, SNSFT: Albion Rovers 0-3 Celtic
Moussa Dembele knocked in Celtic's second goal this afternoon. That takes the striker on to 20 for the season.
Image source, SNSThe draw for the last 16 will take place at the Excelsior Stadium and it's the unlikely combo of Rod Stewart and Alan Stubbs doing the honours.
Here are the remaining teams:
Aberdeen
Celtic
Clyde or Stirling Albion
Dunfermline
East Fife
Hamilton
Hibernian
Inverness CT
Morton
Partick Thistle
Queen's Park or Ayr United
Raith Rovers or Hearts
Rangers
Ross County
St Johnstone
St Mirren
FT: Albion Rovers 0-3 Celtic
That stats show Celtic had 20 shots to Albion Rovers' one, although I can't say I remember the League One side having any efforts on goal.
It was one-way traffic from start to finish but the part-timers deserve credit for their determined defending until the closing stages when Patrick Roberts took advantage of their tiring legs.
It's 25 domestic games unbeaten for Celtic as manager Brendan Rodgers enjoys his first taste of the Scottish Cup.
Scott Sinclair scored a wonderful first-half goal, with Moussa Dembele and Stuart Armstrong adding late goals as Rovers tired.
Stuart Armstrong
Patrick Roberts is the man to open up Rovers again as he dances his way in from the right flank to cut the ball into the centre of the penalty box and there is Stuart Armstrong to slam a shot high into the net.
Albion Rovers 0-2 Celtic
Stuart Armstrong shows good strength and skill to muscle his way past a couple of challenges on the edge of the box and his shot is well stopped by Ross Stewart.
Albion Rovers 0-2 Celtic
Alan Reid leaves out a leg to take out the marauding Patrick Roberts and is booked. The Rovers man is too tired to complain to referee Willie Collum.
Albion Rovers 0-2 Celtic
Albion Rovers win a free kick and finally commit players up the park. However, someone strays offside and they all have to rush back into their defensive positions.
@bbcsportscot
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Albion Rovers 0-2 Celtic
Kyle Turnbull has put in a real shift for Rovers and he gets a well earned rest as full-back Kevin McCann comes off the bench to try and quell the threat of Patrick Roberts.
Moussa Dembele
It was coming after me moaning about how boring the game was... Patrick Roberts bursts forward and slips a pass through for Scott Brown to knock the ball across the face of goal. Moussa Dembele knocks it in with his knee from a couple of yards.