Nicky Morgan, education boss, and David Gauke, the government's Financial Secretary to the Treasury, appeared in Tuesday afternoon's issue of the London daily, accidentally labelled in a picture caption as husband and wife.
Morgan's husband in real life is architect Jonathan Morgan.
Gauke was left bemused by the whole ordeal, tweeting: "A little surprised to learn from the Evening Standard that I am married to Nicky Morgan and called Jonathan."
Morgan has not yet responded to the editing error, although The Spectator assistant editor, Isabel Harman, commented that the Education Secretary looked "thrilled".
@DavidGauke she looks thrilled though.— Isabel Hardman (@IsabelHardman) July 14, 2015
Others even chimed in with messages of celebration to the happy - and surprised - couple.
— Kal S Dhindsa (@KhalSir) July 14, 2015
@DavidGauke congratulations Jonathan.— Giles Mooney (@GilesMooney) July 14, 2015
While it's likely this was simply a sub-editing slip, Morgan and Gauke could be taking advantage of a new Government proposal, revealed in Budget 2015, that would mean married couples would be able to pass on assets worth up to £1m without paying any inheritance tax.