In fact, despite differences in their personalities, the Chicago Fire star seems to suggest it was simply meant to be.
"I'm reserved. She's not. For whatever reason, it works," the 32-year-old actor told E! News' Jason Kennedy at NBCUniversal's Golden Globes afterparty in Beverly Hills on Sunday, Jan. 12.
He added, "It works and that's that."
Christopher Polk/NBC/NBC via Getty Images
Kinney and Gaga certainly proved just that at the shindig, where they had no problem packing on the PDA. The two shared a passionate kiss as they entered the A-list event held at the Beverly Hilton Hotel.
She playfully revealed, "He is extremely strange, actually, and we complement each other's weirdness."