Whoops!

Lady Gaga offered up a lengthy acceptance speech at Monday's Golden Globe Awards, where she walked away a winner for her role in American Horror Story: Hotel. But between naming her castmates, her family members and her "team," Gaga forgot to give thanks to one very important person: her fiancé, Taylor Kinney!

WATCH: Lady Gaga and Taylor Kinney Pose Naked for 'V' Magazine 

"It's one of the greatest moments of my life," an emotional Gaga said from the podium, after taking several minutes making her way up to the stage (and bumping into a highly amused Leonardo DiCaprio in the process). "I have to thank Ryan Murphy. You're just a wonderful human being and you have believed in me so much and been such a good friend to me."

Gaga went on to thank her co-stars -- calling out Matt Bomer, Denis O'Hare, Angela Bassett and several others by name.

WATCH: Taylor Kinney Reveals Why Lady Gaga Slapped Him When They First Met 

"I could go through the entire cast because you're all so talented and because of you I was able to shine, I guess," she said. "Thank you for sharing your talent with me. I wanted to be an actress before I wanted to be a singer, but music worked out first."

Kinney looked on proudly from the audience, having planted a sweet smooch on his future Mrs. just before she took the stage.

Last month, Gaga couldn't help gushing about Kinney's adorable reaction to finding out she was nominated for a Golden Globe. "He was screaming on the phone, we were both laughing," Gaga revealed to ET. See the interview below.