Taylor Kinney has been keeping television fans entertained as firefighter Kelly Severide on hit drama Chicago Fire for almost a decade now. MORE: Chicago Fire star Taylor Kinney's partner made a cameo in season 11 premiere - did you spot her?But how much do you know about the actor when the cameras are off? Find out all you need to know about Taylor's love life here …WATCH: Chicago Fire teases heartbreaking news for Stella Kidd and Kelly SeverideWhile the 40-year-old star has never been married, he was previously engaged to pop star Lady Gaga. The pair met in 2011 on the set of her music video for her song You and I and dated for five years and got engaged on Valentine's Day 2015.