Rumors are already spreading over the net that Miley Cyrus and Liam Hemsworth are already engaged. According to various international news sites including New York Post, Cyrus was spotted Saturday (March 24) at a Muhammad Ali charity gala wearing a large diamond ring. Cyrus and Hemsworth have yet to address any rumours regarding a possible engagement.Apparently, the 19-year-old singer tweeted a picture of her hand before the event, writing, “I am so obsessed with @jennahipp nail foundations! It looks so chic and classic!”On the other hands, at the premiere, E! Online asked Cyrus about what the couple does in their alone time. She said, “We have three dogs, so that takes up most of our time… The only time we leave the house is to go to the pet store or the park.”Meanwhile, the OK magazine reported that Hemsworth is ready to propose to the former “Hannah Montana” star and that the pair have “seriously” talked about marriage.Miley Cyrus will next be seen on the big screen in Lol, a teenage comedy also starring Demi Moore.Hemsworth, the 22-year-old younger brother of Thor actor Chris Hemsworth, is currently starring in The Hunger Games opposite Jennifer Lawrence and Josh Hutcherson.Hemsworth recently laughed off rumors that his girlfriend Miley Cyrus is jealous of his “Hunger Games” fame. The actor is just getting used to the fan frenzy but told “On Air with Ryan Seacrest” that Cyrus is happy for him.“She’s one of the biggest stars in the world, there’s no shadowing her,” Hemsworth told Seacrest. “She embraces it, she’s very very happy for me. I’ve had a few marriage proposals from 12 year old girls! It’s really an awkward question to get a marriage proposal from someone you don’t know at all, and who doesn’t know you!” Get free updates directly to your e-mail from Showbiz Renegade. Just enter your e-mail below and confirm your subscription by clicking the link that will be sent to your e-mail.