Kara Killmer is an American actress, best known for starring as paramedic Sylvie Brett in the NBC drama series Chicago Fire, from 2014 to 2024. Prior to that, she starred in the short-lived 2010 Hulu original reality web series If I Can Dream. Kara Killmer is an American actress, best known for starring as paramedic Sylvie Brett in the NBC drama series Chicago Fire, from 2014 to 2024. Prior to that, she starred in the short-lived 2010 Hulu original reality web series If I Can Dream.