In an attempt to debunk rumors about their characters' love life (Kelly Severide is Kinney's character, while Bush portrays Detective Lindsay), she called out Kinney wearing a band on his wedding-ring finger in the Instagram pic.
She wrote on Tuesday: "I'm REALLY excited to be on @nbcchicagofire tonight! Just about as excited as I was to see my buddy #TaylorKinney at our press day yesterday. Bear hugs are the best hugs. #ChicagoFire #ChicagoPD #ThatsHisPersonalRing #NotForTheShow #EveryoneCalmDown #LindsayAndSeverideArentMarried."
The hashtags that really imply Kinney, 33, secretly married his longtime girlfriend, Gaga, are "#ThatsHisPersonalRing" and "#NotForTheShow." What is Bush trying to say here?
Back in July, some speculated that the 28-year-old "Paparazzi" singer was checking out wedding dresses while in Toronto, Canada with her mother, Cynthia Bissett. "I just had the greatest shopping experience of all time," Gaga tweeted. "It was like cardio and drugs but better maybe not healthy but the vintage was."
However, no wedding band has been spotted on the pop star’s ring finger so the mystery deepens.
Kinney and Gaga started dating in 2011 after meeting on the set of her music video "You and I," and three years later, they're still going strong.
The outlandish pop star has been very open that she wants a family. "I want to have tons of kids, actually. I think at least three," the "Applause" singer told SiriusXM during a Town Hall discussion in New York City this past November. "I really want to have a family and I really want to nurture my children."
She added, "To be honest, having my own kids will be like having three little monsters with me all the time. They probably won't be fans."
Do you think Gaga got secretly married?
Gaga isn't the only fan of Kinney. See how the sexy Chicago Fire guys deal with their obsessed fans.