Jenna Dewan Tatum cast as “Supergirl’s” Lucy Lane August 4, 2015 The Taylor Network no comment on Jenna Dewan Tatum cast as “Supergirl’s” Lucy Lane Jenna Dewan Tatum has joined the cast of the DC Comics-based CBS series as Lois Lane’s sister. Lucy Lane is described as “brash, funny and successful in her own right”. “Supergirl” is scheduled to debut Oct. 26 on CBS. Share this:TwitterFacebookLinkedInPinterestRedditTumblrLike this:Like Loading...