That was fast.
RELATED: See more pics of Heidi Montag
On Monday, Montag, 23, began shooting a cameo in the comedy Just Go With It, starring Adam Sandler, Jennifer Aniston and Nicole Kidman. When reached for comment, Montag's rep told Us Thursday: "Aiden had nothing to do with securing Heidi's role in the movie."
But a source tells Us that Montag was "horrified" when he showed up on set, "demanding a significant portion of her Hills money."
The source adds that when Chase, 40, recently followed her as she filmed MTV's The Hills, he tried to "move onto Audrina [Patridge]," whom he not only offered his healing/spiritual services but also asked to be her manager, the insider tells Us.
Said the source: "He's this creepy older guy who is clearly preying on these young girls. It's awful."
RELATED: See pics of Spencer Pratt
The source adds that fame is going to Chase's head: He is has now hired his mother as his manager, claiming she once served as Halle Berry's manager, says the source.
"The guy thinks he's famous now -- it's ridiculous," said the source. "He's referring to himself as the most famous psychic in the world."
More on Usmagazine.com:
- Jan. 16, 2018 Is January Jones dating Nick Viall? Plus, more news