Martha Madison is an American actress. She debuted in 2001, appearing with a small role in the film Kate & Leopold. She next made one-time roles in the television shows Law & Order: Criminal Intent and Passions. From 2004 to 2008, Madison became widely known for starring as Isabella “Belle” Black in the soap opera Days of Our Lives. She also guest-starred in the TV shows Without a Trace and Criminal Minds. In the 2010s, the actress became further known for her role as Marly Nelson-Foster in the drama series The Bay. After this, she returned to Days of Our Lives, playing the part of Isabella since 2015. Her most recent TV appearance was in 3 episodes of A Place Called Hollywood.