Nicola Sturgeon announced her intention to stand down just two days ago, and the starting gun has been fired on the race to replace her.
The SNP’s ruling body has set out the timetable for the contest, with ballots closing on March 27.
No-one has officially declared they want to step into the First Minister’s shoes, but some important figures have ruled themselves out of the picture.
– SNP Westminster group
SNP Westminster leader Stephen Flynn has ruled himself – and the entirety of his group – out of a tilt at the leadership.
The newly anointed head of SNP MPs told the BBC on Wednesday that he would not be seeking the leadership, insisting the next person for the job would come from Holyrood.
However she has ruled herself out of running.
The announcement – if MPs decide to abide by it – would also rule out deputy Westminster leader Mhairi Black, former defence spokesman Stewart McDonald and ex-Westminster leadership candidate Alison Thewliss.
Mr Flynn’s comments also mean the new SNP leader is likely to be the next first minister of Scotland, rather than the leader serving at Westminster while a deputy runs the country.
– Angus Robertson
Currently the bookies’ favourite for the top job, the Scottish Constitution Secretary has been a high-profile figure in the party for the best part of a decade, serving as Westminster leader before losing his seat in the Commons to Scottish Conservative leader Douglas Ross.
The Edinburgh Central MSP has also been a close ally of the First Minister.
– Kate Forbes
The Finance Secretary, who is currently on maternity leave after the birth of her first child, has long been seen as a potential successor to the First Minister.
But the MSP for Skye, Lochaber and Badenoch, who is a Free Church of Scotland member, could be at odds with the wider party – and current policy – on some social issues, including the hotly debated gender reforms blocked by the UK Government.
– Humza Yousaf
The Health Secretary has consistently been among the names mentioned as a potential first minister of the future.
If he runs, he is likely to highlight his ministerial experience in Ms Sturgeon’s government.
But his stewardship of the controversial Hate Crime and Public Order (Scotland) Bill through Parliament while he was justice secretary and his handling of the current NHS crisis may have dented his chances with the membership.
– Ash Regan
The only candidate who has given even a signal of intention to run, Ms Regan would be considered an outsider for the job.
Ms Regan has since been an outspoken opponent of the reforms, appearing at and speaking to various rallies.
A “source close to” the Edinburgh Eastern MSP told the Daily Express she is considering a run, although no official announcement has been forthcoming.
She has also said former SNP members who left the party in the last year should be allowed to rejoin and take part in the vote.
Ms Regan has also hit out at the process of the leadership race, claiming members did not have enough time to make their decision.
Writing in the National newspaper, she said: “The fate of the cause of independence is inextricably tied to the fate of the SNP.
“Right across the independence movement there is a strong feeling that now is the time to take a breath, to take stock and to think very carefully about where we go next.”
– John Swinney
Ms Sturgeon’s Deputy First Minister has now ruled himself out of running to replace her, ending any speculation that he may do so.
Mr Swinney has encouraged those who end up running to “anchor the SNP in the mainstream of Scottish politics”.