Mary-Kate Olsen and Spencer Pratt
Thos Robinson/Getty; Richie Buxo/Splash News Online
06/30/2008 AT 12:45 PM EDT
It's starting to heat up into another classic Hollywood feud:
vs. self-promoting bad boy Spencer Pratt.
But well before Olsen publicly dissed the villain from The Hills
for being a bad-tempered high-school spoilsport on the Late Show with David Letterman
Friday, the seeds of their mutual antipathy were already planted.
In a 2007 Details
article about Brody Jenner
, best friend Pratt brags to a reporter about how he once made $50,000 by selling a photograph of Olsen drinking at a party back when the two attended the same high school.
And Pratt's glee at his own plots doesn't end there. The other schemes he talks about include having Jenner start dating Nicole Richie
and then try to get her to eat, and trying to date every girl on The Hills
Perhaps most ironic: He spends 20 minutes talking about how he wants to make a sex video with girlfriend Heidi Montag
and then post it online. It's the height of hypocrisy, if you believe Lauren Conrad
's claim that Pratt started the feud between her and Montag by spreading rumors of a sex tape