The socialite-turned-actress has been dating the Entourage star for the past year, and she has now confessed they first connected through the social networking site.
Hearst reveals to Access Hollywood, "We met through mutual friends and Facebook... Actually, I think I might've hit him up. It was a while ago. It's been over a year. But I love him to death and I'm very happy."
Hearst, who serves as a mentor and judge on U.S. modelling competition The Face, also confessed that while she's a fan of her boyfriend's work, there's still one project she has yet to see.
She admits, "I have to admit I have not seen Entourage, but I know they're filming an amazing movie right now. And he's a huge fan of The Face."