During The Hills, the guys and gals ran in the same tight Tinseltown circle — and more often than not, the MTV alums found themselves surrounded by folks they didn’t necessarily want to see (ah, never forget those tense, long stares). But if they had to be stuck on a deserted island with one cast member, who would they choose?

“It would be Stephanie Pratt,” Lauren Conrad — who will return to the network for the 10th-anniversary special The Hills: That Was Then, This Is Now — divulged to MTV News. “She is so hilarious. I still see her when she comes in to town — she lives in London now. I don’t stop laughing when I’m around her. She’s so funny.”

But did Spencer Pratt’s little sister opt for the Laguna Beach star? And who did Heidi Montag, Brody Jenner, and Whitney Port pick? No frenemies allowed in these middle-of-nowhere quarters, that’s for sure ...

Watch the video above to hear Stephanie, Heidi, Brody and Whitney sound off — and be sure to catch the foursome reveal “100 Things About ‘The Hills’” during a special Hills marathon on Tuesday beginning at 10 a.m.! Then catch Lauren spill behind-the-scenes secrets and take us inside her everyday life on The Hills: That Was Then, This Is Now at 9/8c (peep a sneak peek from the one-hour installment below).