Eternal Nightcap is the third studio album by Australian rock band The Whitlams, first released by Black Yak Phantom in September 1997.

Single No Aphrodisiac was voted number 1 on the Triple J Hottest 100 in January 1997 and won Song of the Year at the 12th Annual ARIA Music Awards in 1998.

On 6 August 2009, The Whitlams played Eternal Nightcap in its entirety for the first time, with the exclusion of "Tangled Up in Blue", at the Karova Lounge in Ballarat.

In August 2009, they played the entire album in full before moving on to various other hits, first at the Corner Hotel in Richmond, Melbourne and then at The Tivoli in Fortitude Valley, Brisbane.

This album was released by Black Yak Phantom/Warner Music Canada in 2000, coinciding with The Whitlams Canadian tour supporting Blue Rodeo.