“The Hills� are alive with the sound of wedding bells. Spencer Pratt and Heidi Montag, co-stars of the MTV reality show follow-up to “Laguna Beach,� are engaged. They have been dating for eight months.

23-year-old Pratt proposed to 20-year-old Montag last week in Santa Barbara, reports Us Weekly. Pratt presented Montag with a diamond-encrusted platinum band with a pink stone at the Bacara Resort & Spa. An insider told Us, “[Heidi is] over the moon!"

Last month Heidi’s mother, Darlene Egelhoff, spoke to Radar magazine about her daughter’s relationship with Spencer. She claims that despite Spencer’s villainous portrayal on “The Hills,� he is actually a good boyfriend. Egelhoff said, “He's not a bad guy at all—that's all in the magic of editing. In fact, he adores Heidi and waits on her hand and foot, and she'd be with nothing less.�