NEW PICS: Ashley Tisdale and Fiance Christopher French Playfully Pose at Their Engagement Party

Introducing the future Mr. and Mrs. French!

Ashley Tisdale and her rocker fiance Christopher French hosted an engagement party at Bagatelle restaurant in Los Angeles Nov. 14 with their family, friends and famous co-stars toasting the husband-and-wife to-be.

And Celebuzz has all the exclusive (and cute!) pics from inside the photo booth.

The blonde beauty’s hubby-to-be wasn’t the only one Tisdale was puckering up to… her former castmates got in on the action, too.

It was a Hellcats reunion with actors Robbie Jones, Matt Barr, Heather Hemmens, Sharon Leal and Paul Becker taking over the popular photo booth for a commemorative snapshot of the night.

And that wasn’t the only special touch that made the night memorable.

Her High School Musical co-star Corbin Bleu said “cheese!” with his girlfriend actress Sasha Clements, while Tisdale’s “flower girls” donned funny glasses and mustaches to strike the perfect pose.

“The restaurant was closed just for them and their friends and family,” a source told CB! “There was an open bar and the DJ was great.”

DJ Sean Patrick took over the turntables playing old disco to classic rock that everyone danced to all night, E! reported.

The couple, who got engaged atop the Empire State Building in August, also sipped on Mia Dolcea bubbly and nibbled on crab cakes, truffled chicken, mini steak baquettes, salmon tartare, mini fig tarts, and petite endive salad, and a cake adorned with couple’s initials “C&A.”

“Ashley and Christopher are so in love,” said the source, adding they’re planning on walking down the aisle sometime next year. “They’re both so grounded.”

The 28-year-old bride-to-be even Instragammed the night to remember alongside French, her friends, sister and mom: “Thanks to everyone who came out and celebrated with us,” she wrote.

Take a look at all the exclusive inside pics in the CB! gallery above.