Wow, Saturday Night Fever premiered 40 years ago already?!
In honor of the iconic movie reaching this big milestone, click through the gallery below to see John Travolta and the rest of the cast then and now — and find out what they've been up to since 1977!
After Saturday Night Fever, John became most known for his roles on Welcome Back, Kotter, Grease, Pulp Fiction, and The People v. O.J. Simpson: American Crime Story, among others.
R/R, Getty Images