Jocely Kirsch and Edward Anderton's alledged fraud scheme paid for jaunts to Paris, London and Hawaii.
A lawyer for Jocelyn Kirsch, 22, said she and her now-ex-boyfriend have signed federal plea agreements that probably will send them to prison for several years for ID theft and other crimes.
Since her arrest, Kirsch's friends and classmates at Drexel University have portrayed her as a serial liar who even masked her identity when she met the heir to the British throne at a student forum in Philadelphia last year; in a favorite myth, she told him she was Lithuanian.
When Kirsch and Edward K. Anderton, 25, were arrested in December, photos found on a laptop in their $3,000-a-month apartment showed the couple smooching under the Eiffel Tower, riding horseback on a beach and flaunting skimpy red swimsuits by a swanky hotel pool.
The couple is accused of stealing credit-card and bank-account information from friends, co-workers and neighbors to finance lavish purchases and travel, prosecutors said.
They were arrested when they claimed a package at a local UPS store under a neighbor's ID. The package contained lingerie from a British retailer.
"They were just so arrogant," Philadelphia Detective Terry Sweeney, the lead investigator, said Monday. "When you start committing ID theft around the corner from where you live, it's going to come back to haunt you."
Anderton, who graduated from the University of Pennsylvania in 2005 with an economics degree, also set up eBay accounts with stolen identities to buy and sell nonexistent goods, authorities said. That scheme alone netted $33,000, U.S. Attorney Patrick Meehan said.
Kirsch's lawyer, Ronald Greenblatt, said his client signed an agreement to plead guilty to two counts of aggravated identity theft, money laundering, bank fraud and other charges.