Are wedding bells sounding for Liam Hemsworth and Miley Cyrus? Well, if these photos of Miley wearing a very big diamond a very important finger are any indication, the answer is yes!

Liam Hemsworth with Miley Cyrus wearing diamond ring at Celebrity Fight Night XIIIRelated article: Miley Cyrus Responds to Backlash Over 'Science vs. Religion' Twitter Comment

While at Muhammad Ali's Celebrity Fight Night XIII this weekend, Miley posed for photos and performed onstage wearing the diamond ring on her left ring finger. She also tweeted a picture of her hand wearing the ring on Thursday -- but she didn't mention the ring directly. Instead, she tweeted about her nails, saying, "I am soooo obsessed with @jennahipp nail foundations! It looks so chic and classic!" Check out the photo:

Miley Cyrus wearing diamond ring in Twitter photo

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Miley and Liam have been together since 2009 when they met filming the drama The Last Song. They live together already -- so is marriage the next step? Well, though they haven't yet announced an engagement, OK! magazine is reporting that they are definitely headed in that direction! "They're still keeping it a big secret," OK!'s source said. "Liam is crazy about her, though he hasn't proposed formally yet." And it sounds like when they do get engaged, Miley's family will be very happy. "The whole family loves him. They know Miley's no angel, but she's much calmer with him in her life."

So what do you think? Is that an engagement ring on Miley's finger or just a pretty accessory?

Photos courtesy of Getty / Twitter