The 19-year-old was rocking a long leopard skirt with a thigh high slit, combat boots, and a tank top, while Liam was more casual in jeans and a tee.
The couple have been engaged for a few months now, but don't expect them to tie the knot anytime soon.
She told reporters on the red carpet of the 2012 MTV Video Music Awards, "I'm really excited to, obviously, get married, but I kind of already feel married. I know we are forever. I don't really need the paper right now, so I'm just really trying to work."
Miley is currently focusing on her fourth album, which is expected be out in 2013, but you don't have to wait that long to hear tracks of her new material.
"I'll have a single out this year. This is the first time I get to tell people about it, so I'm really excited! I'm really proud of the album," she added. "It's my favorite thing I've done, probably ever. It's all really different."