Rangers almost light up the gloom amid the smoke as Nicolas Raskin fires a drive from 16 yards that takes a nick off defender Cameron Carter-Vickers and wide of the post for the first corner.

Celtic manage to clear.

A peep of referee replacement referee Don Robertson's whistle and we get the game under way eventually as Rangers, apparently, take the kick-off.

You can hardly see the pitch there's so much smoke from the pyrotechnics...

Seems like there will be a delay in kick-off. Drama already...

A late change of referee.

Willie Collum apparently picked up a calf strain in the warm-up and has been replaced by fourth official Don Robertson.

Hampden erupts as the teams come out at Hampden...

The pyrotechnics are set off at both ends, adding additional colour.

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Neil McCann
Former Rangers winger on BBC Sportsound

It's so important Alfredo Morelos puts in a big performance today and takes the opportunity, which could be the last swan song for him at Ibrox.

The responsibility for goals falls on Morelos.

Rangers have netted seven goals in their Scottish cup run, with a different scorer each time.

Celtic have scored 13 times - almost double that of their rivals - on their run to Hampden, with Aaron Mooy and Kyogo Furuhashi netting three each.

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Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

This is Celtic's strongest line-up today.

Reo Hatate strengthens Celtic, Jota will be up for it.

The conditions are perfect for technical players and Celtic have plenty of them.

Colin Moffat
BBC Scotland at Hampden

Plenty of colour in the Rangers end too. And the noise is starting to really crank up. It's a struggle to hear the blaring PA system as the teams are announced.

Not long to go now.

Willie Miller
Former Aberdeen defender on BBC Sportsound

Alfredo Morelos looked so disinterested last weekend at Pittodrie. He was jogging about at times and offered very, very little in terms of a threat.

In a game like this, he might be able to bring it because of the occasion, but this season for me, he hasn't shown the ability he has got enough.

At the other end, you've got Kyogo who can terrorise defences and this is a vulnerable looking Rangers defence. They need to get their act together or they could be ripped apart.

Celtic have won the Scottish Cup a record 40 times, with their last triumph coming in 2019-2020 against Hearts.

Rangers have lifted the trophy 34 times and are the holders after defeating Hearts 2-0 in last season's final to win the competition for the first time in 13 years.

Colin Moffat
BBC Scotland at Hampden

Celtic fans have been encouraged to wear the club's hoops today. It's like a huge reverse of the Where's Wally cartoon in their half of the national stadium.

Rangers manager Michael Beale is pleased to be able to bring centre-half Connor Goldson and winger Ryan Kent back into his side after injury.

"It's has been a settled back four for the majority of my games as manager," he tells BBC Scotland.

"It's important Connor comes back in and leads that back four with his voice. Ryan has played well in this fixture and it gives us someone who can drive us up the pitch.

"We play these games a lot. We have to win every one. They always feel like cup finals. A win is everything, a loss is nothing.

"We owe our fans a performance and a result - they've had a tough season. This season promised a lot, but it's failed to deliver. This is the last chance for us to do significant this season."

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Whoever wins this game will be overwhelming favourites to beat Caley Thistle in the final.

That's why many rate this as the last chance to prevent Celtic completing another treble. Both clubs have completed seven domestic clean sweeps over the years.

Will Celtic get the chance by winning today? Thumbs up for yes, thumbs down for no.

Celtic manager Ange Postecoglou tells BBC Sportsound "it's great to have Jota and Reo Hatate back.

"They've trained well this week," he says. "They add a lot to us. They love these big occasions.

"Each contest brings something different. We've got to be ready for them adjusting. If we play our football, we're hard to stop.

"Every game is always on a knife edge - there's always the possibility of success or failure. What you want to do is run that line on your own terms."

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Neil McCann
Former Rangers winger on BBC Sportsound

I think it is as expected. Connor Goldson coming in will be welcome news for the Rangers supporters.

This is a massive, monumental day for the Rangers players to step up and go one step further.

Colin Moffat
BBC Scotland at Hampden

It's a dreich old day in the southside of Glasgow, with persistent drizzle tumbling as the teams go through their final warm-up drills.

The turf looks in good nick after yesterday's game and the slick surface should be ideal for zippy passes and crunching slide tackles to get the juices flowing.

Rangers and Celtic are no strangers to meeting in Scottish Cup semi-finals and here's a few classic goals from there to whet your appetite.

Rangers goalkeeper Allan McGregor is a man of few words in front of the camera and he has played down the "hype" around today's game, repeatedly saying this is "just another game".

"Of course, it'd be great from everybody," the goalkeeper tells Viaplay when contemplating a return to the cup final.

"We know it's going to be a tough game and we'll need to put the hard work in."

That interview appeared harder work than the actual game for the veteran former Scotland international.

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