"Lady Nina" is a song by the British neo-prog band Marillion.

First released in 1985 on the B-side to the #2 UK hit single "Kayleigh", it was the only single from the EP Brief Encounter released in the United States by Capitol Records in April 1986.

The cover was designed by regular Marillion collaborator Mark Wilkinson.

The third European single from the Misplaced Childhood album, "Heart of Lothian", featured as the B-side.

[3] The regular 7" single featured an edited version of the title track with a playing time of 03:39; this version was identical to the one found on the b-side of the "Kayleigh" 7" single.