The former Hills star posted a picture of her giant engagement ring from boyfriend William Tell on Instagram this morning with the caption "Best surprise ever."
She also shared the good news on her blog with the message, "I am very excited to share with you guys that William and I got engaged over the weekend. I am beyond thrilled! Get ready for lots more wedding content here on LaurenConrad.com as we begin the planning process," and then posted another update telling fans that they were "overwhelmed" by all the well-wishes they had already received.
William is currently in law school at USC and the couple has been dating for two years.
A huge congratulations to the happy couple!