Rolando Aarons looked lively on his Motherwell debut against Celtic, and he's started this game well.

He's just called Vaclav Hladlky into action for the first time as the Newcastle loanee's goal-bound effort is palmed away.

Willie Miller
Former Scotland defender on BBC Sportsound

St Mirren so close to an early lead!

Lee Hodson gets to the touchline and pulls the ball back to Ilkay Durmus, whose effort comes back off the near post and is cleared away to safety.

Kilmarnock drive forward through Alan Power, and Eamonn Brophy slices a ball across the face of Joe Lewis' goal, just wide of the post from a tight angle.

And we're off...

Aberdeen manager Derek McInnes says his side will need to show their quality to beat a Kilmarnock side who have "found their shooting boots" after two successive wins and six goals over 180 minutes.

"For me the whole narrative of the season can be defined by a good cup run and that's what we want to do," McInnes tells BBC Scotland. "We've always felt we've been a very good cup team - I think the stats show that.

"We want to make sure we start enjoying playing at home again. We know to beat a resolute and organised Kilmarnock team we'll need to show our qualities."

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St Mirren manager Jim Goodwin: "It’s a great opportunity for both clubs to get a place in the last eight.

"There’s no fear, there’s no pressure on us. We’re going into the game as slight underdogs because of Motherwell’s league position and ours. I want the players to have that self-belief that they are capable of beating a very good Motherwell team."

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Motherwell manager Stephen Robinson: "St Mirren will see it the same as we do – a chance to progress. This is a one-off game. They’ve improved, both games in the league were very close even if the scoreline in one of the game doesn’t reflect that."

Inverness CT: Ridgers, Rooney, McKay, McHattie, Tremarco, Trafford, Welsh, Carson, Storey, Walsh, White.

Substitutes: Mackay, Keatings, Vincent, Todorov, Harper, MacGregor.

Livingston: Schofield, Lawson, Brown, Guthrie, Lamie, Bartley, Jacobs, Pittman, Souda, Lawless, Dykes.

Substitutes: Maley, McMillan, Taylor-Sinclair, Crawford, Sibbald, Robinson, Menga.

Hamilton assistant manager Guillaume Beuzelin: "It was a pleasing performance in terms of effort. Similar to Celtic last week, we performed well for large spells but ended up with nothing.

"The injuries had a massive impact on the game. After 75 minutes the legs were tired but we couldn't make changes because we had used all three subs.

"Young Jamie Hamilton made a mistake for the penalty but I'm not worried about him, he's a big character."

BSC Glasgow are the only non-league side still standing, even though they don't have a home to call their own.

The Lowland League outfit originate from Broomhill in Glasgow, but play at Alloa's Indodrill Stadium.

That's where they attempt to pull off a giant-killing on Sunday against top-flight Hibernian, having already knocked out League One sides Forfar Athletic and East Fife on their run to the last 16.

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Kilmarnock manager Alex Dyer believes their opponents today are for from in crisis - he expects a tough game and says Derek McInnes should get the chance to steer the Dons back to success.

"He [McInnes] deserves time to put it right," Dyer tells BBC Scotland. "It's not like they are in a crisis - I don't think so.

"It's a big challenge today, good side, big club, it's going to be very tough. Hopefully we can come here and get a result. It's important for us to carry on winning games and keep that momentum going.

"We're not getting carried away, but we're in a good place at the moment. We're working hard, creating more chances, and the boys are taking them."

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St Mirren make three changes to the starting line-up that drew 1-1 with Hamilton on Wednesday.

The first is injury enforced, with the news that Ryan Flynn is out for the rest of the season with a cruciate ligament injury. Lee Hodson, the January loan recruit, replaces Flynn.

Elsewhere, Jon Obika, and another January loan signing, Alex Jakubiak come in for Tony Andreu and Junior Morais.

Motherwell manager Stephen Robinson makes just one change to the side that were beaten 4-0 by Celtic in midweek. Allan Campbell drops to the bench, with Mark O'Hara given his place in the starting line-up. Tony Watt, who joined on a free transfer yesterday, is on the bench.

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Derek McInnes has made a raft of changes to the Aberdeen side that lost 1-0 at home to St Johnstone during the week.

January signing Ronald Hernandez, Dylan McGeouch, Ryan Hedges, Jon Gallagher and the injured Ash Taylor all drop out.

Shay Logan, Mikey Devlin, Dean Campbell, Niall McGinn and Funso Ojo all come in as the Pittodrie side aim to break their run of four games without a win - or a goal.

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Two of Kilmarnock's three goal scorers against Hearts midweek drop out today - Chris Burke and Stuart Findlay will not feature for the visitors.

Wolves loanee Connor Johnson and Kirk Broadfoot come in - the latter making his first start for the club since returning to the club from St Mirren on transfer deadline day.

Alex Dyer appears to be going for a change of system, with three at the back.