Emily Temple, Viscountess Palmerston, styled The Honourable Emily Lamb from 1787 to 1805 and Countess Cowper from 1805 to 1839, was a leading figure of the Almack's social set, sister of Prime Minister Lord Melbourne, wife of the 5th Earl Cowper, and subsequently wife of another Prime Minister Lord Palmerston.

Almack's was the name of a number of establishments and social clubs in London between the 18th and 20th centuries. Two of the social clubs would go on to fame as Brooks's and Boodle's. Almack's most famous establishment was based in assembly rooms on King Street, St James's, and was one of a limited number of upper-class mixed-sex public social venues in the British capital in an era when the most important venues for the hectic social season were the grand houses of the aristocracy. The site of the club, Almack's Assembly Rooms or Willis's Rooms, has become retrospectively interchangeable with the club, though for much of the club's lifetime, the rooms offered a variety of other entertainments with no connection to the club.