From awkward run-ins with players from their past to shocking phone calls from the fiances of frenemies, the cast in the last “Hi Lauren, It’s Spencer…” episode of The Hills encountered plenty of unexpected surprises and jaw-dropping moments. Relive all the action - and shop the their head-turning looks - in our Hills episode 509 photo gallery!

Photos courtesy of MTV.

Heidi tells Stephanie that her "princess wedding" to Spencer is officially on. Then she asks Stephanie to persuade Lauren to come to the nuptials.

Lauren tells Stephanie that it wouldn't make a difference to anyone if she attends Heidi's wedding, so she's not going.

Heidi is elated when she finds the perfect wedding gown, but her mood is dampened when Stephanie tells her she doesn't think Lauren is coming to the ceremony.

Things get a little tense at brunch when Audrina reveals that she is going to Heidi's wedding and even Lo might attend.

Audrina, Lo and Stephanie get ignored by Brody, Frankie and Jayde even though they are all sitting at the same table.

Kelly Cutrone approaches Stephanie at the Nylon part and the two get into a heated conversation about why Stephanie was fired.

The next day, Heidi stops by People's Revolution to personally deliver Lauren's invitation to the wedding.

Lauren tells Heidi, "I don't want one of the most amazing people I've ever known to disappear" before giving her a hug goodbye.

Lauren gets an unexpected phone call from Spencer after Heidi leaves.

Spencer calls Lauren and apologizes for spreading rumors about her. He makes a plea for Lauren to attend his and Heidi's wedding, because it would be "life-changing for Heidi."