Lauren Conrad is engaged to William Tell!

The former star of MTV's "The Hills" announced the news on her blog Sunday, already making arrangements to share her wedding planning details.

"I am very excited to share with you guys that William and I got engaged over the weekend. I am beyond thrilled!" LC wrote. "Get ready for lots more wedding content here on LaurenConrad.com as we begin the planning process."

The 27-year-old fashionista also shared a photo of her sparkling engagement ring nestled next to another ring that bore the word "love." She also reposted the photo on her Instagram account with the caption "Best surprise ever."

The "Infamous" author, who segued her reality-TV fame into a successful career in fashion, began dating the USC law student/songwriter in 2012.

"William and I are overwhelmed by all of your warm wishes," she wrote in a blog update. "Thank you so much for sharing in this special moment :-) XO Lauren"

Conrad's first boyfriend, Justin Wahler, also had nuptial news to share this past weekend. Her "Laguna Beach" costar married model Ashley Slack on Saturday, according to E! News and People.

ALSO:

DWTS' alum Edyta Sliwinska is pregnant, baby due in January

Miley Cyrus: Letting the Liam Hemsworth 'chapter kind of close'

'Once Upon a Time' stars Ginnifer Goodwin, Josh Dallas engaged

Follow Ministry of Gossip @LATcelebs.