The Chicago Fire star also reveals how his costars helped Gaga prepare for her American Horror Story role
“We’ll keep it a surprise,” he tells PEOPLE when asked about the date.
He adds that when it comes to the wedding’s style, that’s all up to Gaga, 29.
The singer, who earned a Golden Globe nomination for her work in American Horror Story, has spoken out about her experience being raped when she was 19, and Kinney says it’s important to be supportive of his fiancée.
“I don’t prod. I don’t push. I don’t ask. If she wants to let something personal out, she does it on her own,” he says.
Kinney, 34, also talks about giving Gaga support as she entered the acting world, with him and several Chicago Fire costars Eamonn Walker and Monica Raymund helping her run lines.
“There are a few scenes, whether Monica saw or Eamonn saw that they remember running and say ‘kudos’ and ‘good job,'” he said. “She’s really taken to it.”
Gaga and Kinney were engaged last Valentine’s Day after he presented her with a heart-shaped ring. They began dating in 2011 after the couple met on the set of her music video for “You and I.”