Away we go.

Talbot boss Tommy Sloan has a huge grin on his face.

Jackie McNamara
Former Celtic defender on BBC Radio Scotland

Celtic need to be professional. They will want to get the job done as early as possible and possibly rest McGregor before Thursday.

Here come the players at Rugby Park.

What an occasion for the Auchinleck Talbot fans and players alike.

Auchinleck captain Neil McPherson is dreaming of a repeat of 2019, when Talbot beat second-tier Ayr United 1-0 to reach the fifth round, when they lost away to Hearts.

"If I was a Celtic fan, I would be concerned about our striker, Kyle McAvoy, and [winger] Connor Boyd," he tells BBC Scotland.

"The two of them are workhorses, don't give defenders a minute, dead physical, which I think will help them compete better.

"And then the boys in the middle, Austin Sime, Luke Main, don't stop running and are very good technically."

McPherson points out a dressing room split evenly between Celtic and Rangers fans have taken Monday off from their full-time jobs in antipation of having to recover from putting their all into "a once in a lifetime" opportunity.

Image source, SNS

Wullie Muir: The home goalkeeper made over 200 appearances for Queen's Park as they rose from League Two to the Championship. Eight clean sheets so far this season.

Cameron Crooks: Signed from German sixth-tier side TSV Buch in Nurnberg, the 23-year-old midfielder came through the youth academy at Partick Thistle.

Connor Boyd: 23 goals in 22 games this season for the striker, who has scored in his past seven games. Four of his strikes this term have come in the Scottish Cup. Watch out.

Aberdeen interim manager Peter Leven, who was unable to give an update on their manager search, is just relieved to be through to the next round.

"As we saw yesterday, there were a few upsets and we didn't want that today," he tells BBC Scotland.

"We started really well, got the goal, then a couple of mistakes and we looked a bit nervy.

"But we had lots of shots and I thought our corners were really dangerous.

"Shouldn't have been hanging on at the end - we should have been more clinical."

As for debutant Lyall Cameron's man of the match performance, Leven adds: "I thought he was excellent. He's only been in one day, but you can see his quality and he will get better."

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Raith Rovers manager Dougie Imrie tells BBC Scotland: "Obviously we are disappointed to be out the Scottish Cup, but I'm really proud of the group there.

"I thought they were excellent albeit the important thing is the first 20 minutes and that is when we lost it. It was set play and that is disappointing.

"I thought, as the game went on, we got stronger. But it was not to be. There wasn't that cutting edge and that has been the story this season and we refocus on league business."

Image source, SNS

Even though this game has been moved to Kilmarnock, Auchinleck have done their best to make Rugby Park feel like home.

Image source, SNS

Image source, SNS

Celtic interim manager Martin O'Neill tells BBC Scotland: "It's certainly an awkward tie for us. The competition has a phenonemal history and it's just nice to be involved again.

"A home tie at a tight ground... as Celtic manager I'm delighted they've shifted it, but as a neutral I'd rather the game was there because it evokes all sorts of things and Cup upsets are part of the game.

"I want to have an opportunity to see some of the players. I'm loathe to think about the competition that we're treating it lightly.

"These are professional players, Scottish internationals, playing. Callum [McGregor] wanted to play, so I wanted to go with him.

"It's great credit to Tommy for all the things he's done at junior level. He's managed the one team, while as I've been round the block and then around again."

Image source, SNS

Image source, SNS

This is Martin O’Neill’s first Scottish Cup match since the 2005 final win over Dundee United - the final match of his first spell in charge.

Alan Thompson's 11th minute goal was the difference between the teams.

The midfielder drilled a free-kick low towards goal and it came off United defender Garry Kenneth on its way in.

The Northern Irish manager has won this competition three times in total.

Having had a couple of games postponed due to frozen pitches, Talbot have not played since 20 December.

A four-game winning run was ended that day after they uncharacteristically surrendered a 3-0 lead as they lost 5-3 to Drumchapel United in the West of Scotland Premier League.

It leaves Tommy Sloan's side second, five points behind Ayrshire rivals Troon but with three games in hand.

However, to get to this stage, they have already derby rivals Cumnock, Gretna 2008 then a stunning 4-0 win away to League 2 side Dumbarton.

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For Talbot programme writer Jim McAuley: "It will be the greatest day in the club's history to play a world-renowned team like Celtic. It will be up there with when The Who played here in Auchinleck Community Centre. David and Goliath."

McAuley knows all about that, being club historian, chronicling more than 100 trophies since their establishment in 1909.

Those include 14 Scottish Junior Cups - eight of them this century - for a club who sit second in the West of Scotland League Premier Division, two points behind Troon but with two games in hand, after entering the senior pyramid.

"I would say we are the biggest weeist club in Scotland," he says, adding that he is "absolutely devastated" that the tie has been moved.

"Down here, I think we would have had that wee chance, but at Rugby Park, I think they'll be too much for us. In the days after, Celtic go to Bologna. We go to Pollok in the west of Glasgow."

Despite that, McAuley admits "stranger things have happened" in football, recalling that Talbot beat Celtic 3-2 in their only previous meeting - a testimonial in 1992, albeit with visitors sending a youth side.

Auchinleck Talbot took the "difficult and extremely disappointing" decision to move this tie against Celtic to Kilmarnock's Rugby Park.

The West of Scotland League Premier Division club said there were concerns over whether surrounding infrastructure could cope with such a high-profile event, having taken advice from the Scottish FA and Police Scotland.

The Ayrshire club's Beechwood Park ground holds 4,000 people, compared to the 15,000-capacity stadium 15 miles up the A76.

Image source, SNS

Image source, SNS

Celtic make 10 changes to the team that narrowly defeated Falkirk in the league on Wednesday.

Captain Callum McGregor is the only player retained as Martin O'Neill gives chances to the fringe members of his squad.

Young Colby Donovan starts at left-back, while the lesser-spotted Michel-Ange Balikwisha is in a front three with James Forrest and Johnny Kenny.

Stephen Welsh - recalled from his loan at Motherwell earlier this month - is picked at centre-back, which could be good news for fans of the Fir Park outfit.

If he were to go back out on loan, it could only be a return to Jens Berthel Askou's side.

Image source, SNS

Ryan Stevenson
Former Hearts forward on BBC Sportsound

Because the pitch is so tight at Beechwood, they can play 4-4-2 and get balls into the box.

But Rugby Park is so big even for full-time players and it is going to be so hard for them.

At some stages, I think they will be a 5-5 formation.

I am so disappointed that they could not have had it at Beechwood as this would have been a monumental occasion. I just think it was a poor decision and it takes a bit of the shine off the tie.

Auchinleck Talbot: Muir, Clark, Schoneville, Wilson, McPherson, Sime, Crooks, Main, Boyd, McAvoy, Gillies.

Substitutes: Longmuir, Nimmo, Kazoka, Abed, Scott, Wood, Kerr.

Celtic: Sinisalo, Ralston, Murray, Welsh, Donovan, McGregor, Bernardo, McCowan, Forrest, Kenny, Balikwisha.

Substitutes: Schmeichel, Scales, Nygren, Yang, Shin, Tounekti, Maeda, Hatate, Haney.

We'll bring to reaction from Pittodrie while also turning our attention to the second of our Scottish Cup ties today.

Sixth-tier Auchinleck Talbot host Celtic in the biggest game in the Ayrshire side's history.

Team news coming up...

James McFadden
Former Scotland forward on BBC One Scotland

When you go into games like this, it's just about winning the game and getting through.

There are signs there's talent there, but sometimes it's the same problem - the speed of play, the final ball, the final decision.

Most importantly, they've won. Raith made it difficult, gave themselves a chance to get level.

Aberdeen got the job done, so you have to give them credit.