Don’t expect to see George Clooney and Leonardo DiCaprio at the same Oscar party!

The two have become rivals, a source says, and with critics panning Clooney’s latest movie, “The Monuments Men,” and Di­Caprio an Oscar favorite for “The Wolf of Wall Street,” Gorgeous George is steaming.

George thinks Leo is an ar­rogant punk who talks trash and surrounds himself with a bunch of brown-nosing toadies,” said an in­sider. “Their feud has been going on for years, but it’s really heated up as Leo is about to unseat George as the new King of Hollywood.”

The two have been at odds since DiCaprio, 39, dropped out of the 2011 drama “The Ides of March,” which 52-year-old Clooney wrote, directed, produced and starred in, the source said.

“They just couldn’t get along,” revealed the insider. “Leo stayed on as executive pro­ducer from afar while Ryan Gosling took over his role.”

The feud intensified when Clooney called out DiCaprio in a recent magazine inter­view, claiming he and his 50-something buddies beat Leo and his gang of yes-men at basketball by a score of 11-0 in three straight games.

“The discrepancy between their game and how they talked about their game made me think of how important it is to have someone in your life to tell you what’s what,” Clooney said. “I’m not sure if Leo has someone like that.”

The insider said: “When Leo heard about George’s lame attempt at trying to keep him grounded, he was livid.”

Both Clooney’s film “Gravity” and “Wolf ” are nominated for Best Picture, but with a Best Actor Golden Globe for “Wolf ” already on his mantelpiece, DiCaprio is riding high as the March 2 Oscar ceremony nears.

“It seems like everyone in show business is rooting for Leo to win Best Actor, except George,” said the source. “He wants to see Leo fall on his ass.”