Who will join Dunfermline & Falkirk in Scottish Cup last four?

Dunfermline Athletic and Falkirk have already booked their places in the Scottish Cup semi-finals, but who will join them?

John McGlynn's Bairns saw off Dundee United on Friday before holders Aberdeen were ousted by Neil Lennon's second-tier Pars, but four former winners are still to see action as they fight for a place at Hampden.

Sunday's Old Firm derby will draw most of the headlines, while Glasgow rivals Partick Thistle will hope to make it two Championship sides in the last four when they visit St Mirren in the later kick-off being shown live by the BBC.

Old Firm derbies seem to arrive like buses these days and the next one arrives just a week after the last.

Both can take some positives from Sunday's 2-2 draw at Ibrox. Rangers for a dominant first-half performance that led to a 2-0 lead. Celtic from a second-half fightback to secure a point with what is becoming a typical late goal.

Martin O'Neill's visitors came off the field the happier and their delight was enhanced further by a 2-1 win in Aberdeen that lifted them above their city rivals into second spot in the Premiership.

With both still trailing Hearts in the title race, and with St Mirren having the League Cup in the trophy cabinet, the Scottish Cup becomes even more vital for two clubs for whom, as Rangers head coach Danny Rohl emphasised on Friday, "must" win silverware each season to keep their fans - and boardrooms - happy.

Celtic will want to go one better than last season's defeat by Aberdeen in the final. Rangers are looking to reach the final for the first time since losing to Celtic 12 months earlier.

The visitors, of course, are looking to lift the trophy for a record-extending 43rd time, three of them in 74-year-old O'Neill's first spell in charge, while Rangers are chasing their 35th.

Honours are even between the Glasgow clubs this season, with each enjoying 3-1 wins on top of two draws, but Celtic have not won at Ibrox in five visits, albeit the latest three finished all-square, so another tight, tense affair full of drama is almost assured.

How they got there:

Rangers have thumped third-tier Annan Athletic 5-0 and Championship side Queen's Park 8-0, both at home.

Celtic overcame sixth-tier Auchinleck Talbot 2-0 at Rugby Park then survived a testing game at home to Premiership visitors Dundee before prevailing 2-1 after extra time.

St Mirren already have one trophy in the bag, surprising Celtic 3-1 in December's League Cup final, and will hope another cup run can lift the gloom that has since descended over the Paisley side since.

Tuesday's 2-1 defeat away to Dundee United leaves Stephen Robinson's side only three points above Kilmarnock in the Premiership relegation play-off spot and having won just three times in 15 outings.

Two of those have came in the cup and they will have high hopes of progress, and a first win in six outings, given they are at home to a second-tier side.

Nevertheless, Thistle are unbeaten in seven outings, three on the road, albeit they have drawn their latest two against promotion rivals Dunfermline and Arbroath to slip five points behind leaders St Johnstone.

It is the Glasgow side's first appearances in the cup last eight since 2019, when the 1922 winners lost to Hearts.

Three-time winners St Mirren also lost to Hearts in their last quarter-final appearance in 2022, having reached the semis the previous season.

Despite their recent problems, they will be strong favourites to deny Thistle a first semi-final appearance since 2002 and record a third straight home win over the Firhill side after League Cup victories in 2020 and 2021.

However, Mark Wilson's side will arrive for a match being shown live on the BBC Scotland channel, iPlayer, online and app dreaming of a repeat of their last Scottish Cup visit to Paisley, when they won 2-1.

How they got there:

St Mirren needed extra-time before beating another Championship side, Airdrieonians, 2-1 away from home in the last round, having also needed penalties to oust Premiership rivals Livingston after a 1-1 draw in West Lothian.

Thistle have beaten three lower league sides so far, 2-0 away to League 2 side Forfar Athletic, 3-1 at home to third tier Montrose 3-1, then were made to fight by fourth-tier hosts Elgin City before prevailing 3-2.