The reality TV star spoke with Barbara Walters by phone, a day after releasing a statement saying she hoped the media would focus on "more important things" than her jail sentence.
"I used to act dumb. ... That act is no longer cute," ABC quoted Hilton as saying.
After spending three days in jail in a reckless driving case, Hilton was briefly released to home confinement Thursday for an undisclosed medical condition. An outraged judge sent her back to jail Friday. She is now housed in the medical ward of a maximum-security detention center.
According to ABC News, the call came after Hilton's mother, Kathy, phoned Walters. During the conversation, the 26-year-old socialite called her mom on another line, found out her mother was talking to Walters, and then called Walters collect. All jail inmates are required to call collect.
Hilton has been saying that she is changed by her jailhouse experience, and she repeated that theme with Walters: "Now, I would like to make a difference. ... God has given me this new chance."