TV EXCLUSIVE: Behind the Scenes of 'Supergirl' With Special Guest Star Lynda Carter By Raphael Chestang 4:46 PM PDT, October 24, 2016 Now Playing hh:mm:ss Supergirl went full fangirl when the CW show got a visit from TV's original Wonder Woman, Lynda Carter, and ET's Leanne Aguilera went behind the scenes with the cast."I'm playing the first female president," Carter dished to ET.WATCH: A Shirtless Chris Wood Battles 'Supergirl'in This Action-Packed Sneak Peek!The actress made her debut as commander-in-chief Olivia Marsdin on Monday's episode, defending the United States from an alien attack.Supergirl star Melissa Benoist was absolutely giddy to have Carter on set, and she revealed one special tidbit that the iconic actress shared with her."She taught me how to do the spin," Benoist said with a giggle. "I learned the Wonder Woman spin from Linda Carter!"RELATED: See the First Photo of Lynda Carter From the 'Supergirl' SetWhile Carter was thrilled to be a part of the series, she pointed out that there are some differences between her 1975 Wonder Woman wardrobe versus the 2016 Supergirl getup."I think [the Supergirl costume] is fantastic," Carter gushed. "It's a little more covered up than mine was. It was the '70s. People were not wearing very much."Supergirl airs Mondays at 8 p.m. ET/PT on The CW.EXCLUSIVE: Watch a Shirtless Chris Wood Fight 'Supergirl' and Escape National City!