Miley Cyrus sparked much speculation that she was engaged to Liam Hemsworth when she tweeted a photo of herself with what appeared to be an engagement ring on her finger last Thursday. Cyrus further compounded the rumors by stepping out with Hemsworth Saturday night with the same sparkler on. Cyrus paired the diamond bauble with a coral, silk, chiffon Jenny Packham gown.

I am sooo obsessed with @jennahipp nail foundations! Cyrus tweeted Thursday in a posting showing off her nails and the bauble.

Cyrus and Hemsworth have been together since June of 2009, when they began dating on the set of their film, The Last Song. In August 2010 it was confirmed that Cyrus and Hemsworth had broken up, but a month later they were spotted together again. In November of the same year reports confirmed that they had split again, but they have since rekindled their relationship.

Hemsworth is currently starring in the box-office smash The Hunger Games. Cyrus and Hemsworth have been spotted together for many of the movie's events. On Saturday the couple attended Muhammad Ali's Celebrity Fight Night XVVIII in Phoenix together, where Cyrus wore the ring.

Neither Cyrus nor Hemsworth have commented on the engagement rumors publicly, but sources told People Magazine that the couple is not engaged.