Ellie Turner and Karen Anderson in sci-fi babe cosplay at WorldCon 1961. They are standing in a rather dull hotel function room with wood paneling and floor, one is wearing a green gauze and sequins belly dancer-esque ensemble and the other is in a purple vest and loincloth over a flesh-colored leotard.

It's Cosplay #ThrowbackThursday! This week, we visit Seacon aka WorldCon 1961! Ellie Turner & Karen Anderson. Photo by Ben Jason. #cosplay #tbt #CosplayIsForEveryone #CosplayHistory #60sCosplay #WorldCon1961 #seacon #scifi #sff #FandomHistory #WorldCon #sexycosplaywasalwaysathing

A black and white photo from Seacon (Worldcon 1961). Two men in costume (alien? ancient Greek?) grasp hands in the foreground, while a third man stands in the background, hand on hip.

It's Cosplay #ThrowbackThursday! This week, we visit Seacon aka WorldCon 1961! Unknown fans at the costume show. Photo by Bill Warren. #cosplay #tbt #CosplayHistory #1960sCosplay #60sCosplay #WorldCon1961 #billwarren #seacon #masquerade #scifi #sff #FandomHistory #WorldCon #fandom

Dick and Pat Lupoff dressed as Captain Marvel and Mary Marvel, at WorldCon 1960.

It's Cosplay #ThrowbackThursday! This week, we visit Pittcon aka WorldCon 1960! Dick & Pat Lupoff as Captain & Mary Marvel, from the collection of Mike Resnick. Photo by Charles N. Brown. #cosplay #tbt #CosplayHistory #60sCosplay #WorldCon1960 #dicklupoff #patlupoff #charlesnbrown #FandomHistory