Alex Salmond is poised to announce that he will fight the Gordon seat at the general election in May.
The former first minister is expected to confirm his candidacy for the north-east constituency tomorrow.
The seat, which includes parts of Aberdeen such as Bridge of Don, as well as Ellon and Inverurie, is currently held by Liberal Democrat Sir Malcolm Bruce, who is retiring.
Mr Salmond was previously MP for Banff and Buchan.
Gordon – which will now become one of the most-watched seats in next year’s general election – was won by Sir Malcolm with a majority of 6,748 over the SNP in 2010.
Mr Salmond announced he was stepping down after seven years as first minister in the wake of September’s independence referendum.