Did she just let the cat out of the bag?

Sophia Bush ignited rumors that her Chicago Fire co-star Taylor Kinney had secretly tied the knot with girlfriend Lady Gaga after she shared a picture of herself with the actor, who is wearing a ring on THAT finger! "That's his personal ring," she captioned the snapshot, making sure her fans didn't think the band on his hand was a spoiler of the show's plot line.

This isn't the first time Mother Monster and her man have been the subject of wedding chatter. Back in July, the singer was spotted checking out wedding dresses during a visit to Canada. "I just had the greatest shopping experience of all time. It was like cardio and drugs but better maybe not healthy but the vintage was," she wrote on Twitter at the time.

The pair have been dating since 2001 after meeting on the set of her music video "You And I", and although they are pretty hush hush about their relationship, it seems they are definitely headed to the altar if they aren't hitched already.