Lauren Marcus (born November 27, 1985) is an American stage actress. She defined the leading roles of Patty Jenkins, the "frightfully nosey" cheerleader in Joe Iconis' musical, The Plant That Ate Dirty Socks, and Hope Horrishall in Rich Espey's drama Hope's Arbor. From November 2008 through January 2009, she starred as Jenny Vecharelli in the off-Broadway musical Rewrite.
Gawker identified Marcus as the character "Janine" on the "Craig and Janine" video series. The video series was subsequently transformed into a live show at the Laurie Beechman Theatre, Craig Stevens Guide to Making it On Broadway, in which Marcus starred alongside Tyler Maynard.