A source tells E! News that Pratt approached new castmember and Lauren Conrad love interest Doug Reinhart and began bad-mouthing his former best friend.
Just what did Pratt say? Read on...
"Spencer said he had no respect for Brody because he was always up Lauren's ass," the source says.
After this classy exchange, Pratt and the rest of the cast headed for a celebratory dinner at Nobu. But things got worse when Jenner found out what Pratt had said.
"They almost brawled right there in Nobu," says the source. "Spencer kept saying, "I'm gonna choke him out.' "
Luckily the squabble got under control and the guys managed to enjoy their dinners at separate tables. When it came time for the check, some MTV producers who were sitting with Pratt picked it up for everyone.
"[Brody] went over to Spencer’s table and thanked everyone for the dinner, then left," says the source.
What some people will put up with for a free meal.