(Yahoo!) - Ashley Tisdale is one step closer to becoming Mrs. French!

After becoming betrothed in August, The "High School Musical" alum and her Annie Automatic musician beau Christopher French were feted at an engagement party Thursday evening.

"Thanks to everyone who came out and celebrated with us!" the actress wrote on Instagram early Friday morning along with a photo from the celebration. She gave the pic the hashtag "engagementparty" and tagged L.A.'s Bagatelle restaurant, a favorite party venue for young Hollywooders.

In the snapshot, the 28-year-old was channeling her inner bride. Wearing a long white dress with thin straps and detailing on the bottom, the blonde, who had her hair half up, was holding court with her future husband as their friends surrounded them. Everyone was smiling, laughing, and having a good time. Tisdale looked beautiful.

In her hand was a very full glass of Mia Dolcea Pink Moscato wine — a color choice that her TV counterpart Sharpay Evans would surely applaud.

The fun wasn't limited to cocktails and chatter. Tisdale and her guests also playfully posed for photos with props, something that has become a wedding staple these days. Her friend Shelley Buckner, who appeared on TV's "Summerland," posted a photo of them together — photo booth style — holding a fake moustache.

"Happy engagement to my best friend, sister, and partner in crime. I am beyond happy for you!" wrote Buckner.

A second pic showed the girls with a larger group and Tisdale was holding a "Future Mrs." sign.

"We got a future Mrs. Right here!" Buckner captioned the pic.

There were no signs of Tisdale's pals Vanessa Hudgens or Zac Efron in the photos. Hudgens has been in New York as of late and Efron's recent stint in rehab and accident which left his jaw wired shut likely doesn't have him in a partying mood.

Tisdale said yes to French's proposal at the Empire State Building in Manhattan over the summer. She shared the engagement news on Twitter soon after, writing, "Best night of my life. We're on top of the world." Soon after she showed off her engagement ring — a traditional-looking mega-carat diamond with a halo of smaller diamonds on the band.

Next stop? Their big day. And if their engagement party is any indication, it's going to be a whole lot of fun.