Chicago Fire has been filled with red-hot romances throughout its run, but nothing compares to Kelly Severide's relationship with Stella Kidd. When fans first met Kelly (played by Taylor Kinney), he was a rough and tough firefighter who was known for being a ladies' man. However, the arrival of Stella (Miranda Rae Mayo) in season 4 shook things up - and changed Kelly for the better. The twosome have weathered many storms before and after tying the knot during season 10, including a failed adoption in season 13 and a pregnancy loss to start season 14. Through it all, Kelly and Stella have stayed united. Scroll down to relive all of Stella Kidd and Kelly Severide's relationship highs and lows: Chicago Fire airs on NBC Wednesdays at 9 p.m. ET.