Joanna Johnson is an American actress, writer and producer, best known for her roles as Caroline Spencer Forrester (1987–1990, 2001) and her twin sister, Karen Spencer (1991–1994, 2009, 2011–2014) on the CBS daytime soap opera The Bold and the Beautiful. She’s also an executive producer and writer on the Freeform’s drama series The Fosters.
In May 2012, Johnson came out as a lesbian during an interview with TV Guide. She married L.A. club promoter Michelle Agnew in 2008, during the four months same-sex marriage in California was recognized. They have two adopted children, Julian and Harlow.