Liam Hemsworth and Miley Cyrus Party With Pals at Gold-Themed Bash -- and Nail Their Looks

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Miley Cyrus and Liam Hemsworth go for the gold!
Amid all the Summer Olympic festivities, the couple celebrated the birthday of Samantha Hemsworth, Luke Hemsworth's wife, with a gold-themed party, which included a giant gold horse. Really committing to the theme, Liam, 26, wore a Gold's Gym tank-top and gold shorts. Miley, 23, also went the athletic route, donning a gold medal and a matching basketball jersey.

Flaming Lips frontman and Cyrus' tourmate, Wayne Coyne, wore gold horns to the party, but it was Liam's brother that nailed his costume. "@thesamanthahemsworth 's birthday," Luke captioned a photo of his epic outfit. "I think the theme was "Gold"? I even had gold mankini on underneath."
Miley seems to fit right in with The Hunger Games star's family. In April, she even got a matching finger tattoo with Chris Hemsworth's wife, Elsa Pataky.
Other stars at the party included Zac Efron and pro surfer Kelly Slater.

Last week, Liam and Miley inspired some serious relationship goals when they did their own version of "Carpool Karaoke" and sang along to Justin Bieber's "Love Yourself." Check it out: