You'd never guess it, but Diane Keaton is a huge Belieber and she went absolutely nuts when she finally got to meet the 21-year-old heartthrob on "The Ellen DeGeneres Show" on Friday.

While celebrating the release of Bieber's new album "Purpose," DeGeneres asked the 69-year-old actress, who was drinking a huge glass of her own red wine, if she was excited about it being Bieber Week. "I like that boy," Keaton said with a smile. The host then told her that "he's a man now," to which she replied, "Even better for me."

DeGeneres then did what she does best and flashed a few shirtless photos of the singer for Keaton to drool over. "That is gorgeous," she said about one shirtless shot. "That's not possible." Just as the host started giving her some "I heart Bieber" T-shirts, he took it upon himself to come out and surprise Keaton, and she just couldn't hold back her excitement as she hugged him and kissed him on the cheek.

"Oh my god. Now I'm shaky. OK, let's get real here. Is he - that's real beauty," an overwhelmed Keaton said. "Do you think he'll ask me out later? Do you think I have a chance? Let's get real."

Watch the hilarious clip below!