Lee David Loughnane (pronounced LOCK-nain;[1] born October 21, 1946) is an American trumpeter, flugelhorn player, vocalist, and songwriter who is a founding member of the rock band Chicago.

Through his friendship with guitarist Terry Kath, Loughnane met drummer Danny Seraphine and saxophone/woodwind player Walter Parazaider.

[5] Loughnane made his lead vocal debut on the Terry Kath composition "Song of The Evergreens" on Chicago VII.

[8] The lanky (6'3") Loughnane had a small speaking role as a pig farmer on a hippie commune in the 1973 film Electra Glide in Blue, starring Robert Blake.

Peter Cetera, Terry Kath and Walt Parazaider also appear in the film, which was directed by James Guercio, Chicago's producer at the time.

Lee, along with his fellow founding Chicago members Robert Lamm and James Pankow, have a cameo appearance as themselves in the 2013 Larry David comedy Clear History.

[10][circular reference] Lee Loughnane, Walt Parazaider and Jimmy Pankow play on two tracks of the Bee Gees' album Spirits Having Flown, "Stop (Think Again)" and "Too Much Heaven".

The Chicago horn section also performed on several tracks of Leon Russell's Americana, most notably Let's Get Started.