RUSSELL CROWE made a big deal about heading back to Australia to patch up his trou­bled marriage to Danielle Spencer – but The ENQUIRER has learned the aging Romeo now has the hots for his beautiful blonde “Les Misera­bles” co-star Amanda Seyfried.

His efforts to woo the 27-year-old ac­tress went for naught, however, because she’s just not interested in a romance with him, say sources.

“I think Amanda was probably grossed out by Russell’s come-ons,” an in­sider told The ENQUIRER. “She’d be repulsed by the way he claims he’s trying to repair his marriage while flirting with her.”

The insider adds that the 48-year-old Oscar winner – now bloated and bearing a bushy gray beard – “was crazy about Amanda” while he was recently shooting “Winter’s Tale” in New York.

“Russell would show up on his bike while Amanda was walking her dog, and he’d try to tag along with her for lunch dates,” said the source. “He went overboard with compliments, rav­ing about her lush golden locks, calling her ‘my beautiful Rapunzel.’

“He even sent Amanda flowers and mushy e-mails, telling her how beautiful and talented she is and how he’d love to find another movie project for them.

“But who could blame Amanda if she is creeped out by him? His unruly beard and big belly make him look like Bigfoot!”

AS THE ENQUIRER previously reported, the father of two was trying to save his mar­riage after it was announced in October that he and his wife of nine years, Danielle, 42, were splitting. Despite reports he was getting cozy with Billy Joel’s ex-wife Katie Lee in December, Crowe proclaimed that his “priority” was to bring his family back together.

“The problem is that Russell just can’t seem to control himself around pretty women,” noted the insider. “But Amanda defi­nitely doesn’t want to get mixed up in his drama.”