Lewis Gillie is on for Hibernian. It's a senior debut for the 16-year-old defender.

Kwon Hyeokkyu makes way.

There will be no Scottish Cup hat-trick for St Mirren's Toyosi Olusanya.

He is replaced up front by Owen Oseni, while Caelan Boyd-Munce is also on for Killian Phillips.

Gully Singh
BBC Sport Scotland at Hampden Park

The home fans are not happy one bit after watching their team throw away their lead to after wasting a handful of chances in the first period.

The travelling support may well enjoy their long return journey if they can see this one out.

Livingston almost make it three as Daniel Finlayson's header hits the back post.

Ross County just do not look like scoring.

Aberdeen should extend their lead.

They have a five-against-one break, but goalkeeper Aidan Glavin turns wide Shayden Morris' drive and the winger is denied his second goal of the game.

The Dons have not put this tie to bed and now they have to scramble clear a corner at the other end.

Warm applause from the Hibs fans as summer signing Kieron Bowie returns from a long-term injury to replace Martin Boyle, who departs with a brace secured.

Luke Amos is also on in place of midfielder Dylan Levitt.

Image source, SNS

Mikael Mandron has a chance to make it three for St Mirren, but home goalkeeper Ross Stewart is off his line quickly to smother the striker's shot.

Motherwell with their best chance of the game but Sven Sprangler keeps the visitors out with a brave block in front of goal.

Rudi Molotnikov nearly nabs his second with a glancing header, but a solid goal-line block thwarts the Hibs youngster's close-range effort.

It's a similar story to the first half at McDiarmid Park, Motherwell are under the cosh as Graham Carey rockets his shot off the post.

St Johnstone should be ahead by more.