Melissa Ponzio is an American actress. Her first notable role was as Robin Ellsworth in Dawson’s Creek. She next guest-starred as Alice in One Tree Hill. In 2002, she had a supporting role in the film The Greenskeeper. Later in 2007, she became known for her role as Angie in Army Wives. In the 2010s, she landed more performances on film and TV. She played a brief role in the movie Life as We Know It. From 2011 to 2017, she starred as Melissa McCall in Teen Wolf. At the same time, she played Karen in The Walking Dead. Since 2014, Ponzio plays Donna Robbins-Boden in Chicago Fire. This year, she starred in the film Thunder Force.