Whoa! After being photographed with a giant rock on her all-important finger, there's quite a bit of buzz surrounding Miley Cyrus and Liam Hemsworth. Are they tying the knot?

They won't say, but we're not exactly holding our breath for this one just yet. In addition to having some issues with her partying, Cyrus is so young that she wouldn't even be able to legally sip champagne at her wedding reception. Additionally, it seems like a PR move more than a romantic one: Cyrus also likes the limelight, and Hemsworth has a starring role in the massively successful 'The Hunger Games,' which opened Friday (March 23).

The rumors began when Cyrus tweeted a photo of her hand, in what sounds like a promotional plug. "I am soooo obsessed with @jennahipp nail foundations! It looks so chic and classic!" Cyrus wrote. This sounds like a bit of marketing genius, doesn't it? If people go see her ring, they'll inevitably see her hand and whatever a nail foundation is, sparking at least passing interest in the product.

Cyrus didn't address the rumors, but instead continued her normal tweets, this time supporting Hemsworth's movie. Cyrus tweeted, "Happy Hunger Games everyone! : ) can't wait for everyone to see it! Such an amazing film! JENNIFER LAWRENCE IS GENUIS [sic]!"

Another telltale sign? Cyrus tweeted once again: pay careful attention to her wording. "I'm sitting here with 3 dogs who love me unconditionally, a beautiful boyfriend, an amazing family, & 5.2m lovely followers." She said "boyfriend," not "fiancee!"

While we've yet to hear an official confirmation or denial, we're willing to be Cyrus isn't heading to a chapel anytime soon.

UPDATE: A source close to Miley insists it's not an engagement ring.