Donna Summer in Thank God It's Friday (1978)

Chick Vennera in Thank God It's Friday (1978)

Debra Winger and John Friedrich in Thank God It's Friday (1978)

Ray Vitte in Thank God It's Friday (1978)

Valerie Landsburg and Terri Nunn in Thank God It's Friday (1978)

Donna Summer and Ray Vitte in Thank God It's Friday (1978)

Mark Lonow and Mews Small in Thank God It's Friday (1978)

Jeff Goldblum and Andrea Howard in Thank God It's Friday (1978)

Paul Jabara and Mark Lonow in Thank God It's Friday (1978)

Andrea Howard and Mark Lonow in Thank God It's Friday (1978)

Valerie Landsburg, Terri Nunn, and Donna Summer in Thank God It's Friday (1978)

Jeff Goldblum, Lionel Richie, Hilary Beane, Andrea Howard, Valerie Landsburg, Mark Lonow, Terri Nunn, Chuck Sacci, Mews Small, Donna Summer, Chick Vennera, William King, Ronald La Pread, Thomas McClary, Walter Orange, Milan Williams, and The Commodores in Thank God It's Friday (1978)

Chick Vennera at an event for Thank God It's Friday (1978)

Jeff Goldblum, Lionel Richie, Donna Summer, William King, Ronald La Pread, Thomas McClary, Walter Orange, Milan Williams, and The Commodores in Thank God It's Friday (1978)

Debra Winger in Thank God It's Friday (1978)

Jeff Goldblum and Nicholas Shields in Thank God It's Friday (1978)

John Friedrich and Paul Jabara in Thank God It's Friday (1978)

Jeff Goldblum in Thank God It's Friday (1978)