So much happy news for former stars of The Hills this weekend!

Reality TV star-turned-bestselling author and fashion plate Lauren Conrad has announced her engagement to boyfriend William Tell. Way to go, LC!

The 27-year-old former Laguna Beach and The Hills cutie took to her blog on October 13 to share the exciting news, along with a photo of her sparkly new bling.

"I am very excited to share with you guys that William and I got engaged over the weekend," Lauren gushes on her site. "I am beyond thrilled!"

Lauren and law student William have lived together in Westwood since September and have been dating since May 2012. William, 33, used to play guitar in the pop-punk band Something Corporate and released a solo album in 2007.

"Everyone is so happy for her," a friend of Lauren's tells People. "He's such a great guy. They are perfect for each other!" 

This is quite the weekend for Hills stars, as Lauren's former reality-show squeeze Jason Wahler married model Ashley Slack yesterday.

More recently, Lauren had been dating My Boys actor Kyle Howard, while William previously dated Pitch Perfect star Brittany Snow. 

Congrats to Lauren and William! And now we can't wait to find out which of Lauren's former co-stars will make the guest list. 

Sources: LaurenConrad.comPeople