At the wedding was Ashley's best friend and High School Musical
co-star Vanessa Hudgens.
Ashley and Christopher met in 2012 and less than eight months later Christopher proposed. After the proposal, Ashley tweeted: "Best night of my life. We're on top of the world".
The ring was designed with one massive square-cut diamond surrounded by pavé stones.
Ashley's bachelorette party was held in Miami in May, where the 29-year-old enjoyed the beach during the day and partied at night with pals including Vanessa.
"You know, I didn't [think it would happen that quickly]," said Ashley of the relationship to Ryan Seacrest in December.
"I think I've obviously been in long relationships in the past, but I think because of knowing what I wanted, I wouldn't have gone into a relationship, if it wasn't what I wanted. And I think from the moment that him and I met, I just knew it."
Speaking of her relationship, Ashley continued: "I was like, 'OK, 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!"
"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, 'This is so natural.'."