The blonde looked smoking hot in a sequined LBD as she posed for photographers on the red carpet on Monday night (27 January).
Ashley and Zac have been friends since starring together in the first High School Musical movie way back in 2006. In fact, Ashley is such a good friend, she was the first to arrive at last night's glitzy screening!
The actress tweeted a photo of the empty cinema with the caption: "#Thatawkwardmoment when you're the first person at the premiere...."
Ashley walked the red carpet solo at Regal Cinemas, leaving fiancé Christopher French at home for the night.
Scary Movie V actress Ashley announced her engagement to musician Christopher in August. It's thought he proposed at the top of the Empire State Building in New York City.
She later told Ryan Seacrest's radio show she had been surprised to be engaged after just eight months but knew it was the right decision.
"I think from the moment that him and I met, I just knew it. I was like. 'Okay, this is the guy.' And he knew the same thing. It was just this feeling that it doesn't get any better. I can't explain it!" she said.
"It's just natural between us. With other relationships, you're trying too much and trying to make it work and then there's just a moment when you find somebody and you're like, 'Holy s**t! This is so natural.'"
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