Jennifer Aniston has admitted she is having fun showing off her naughty side in Horrible Bosses.
In the comedy, the former Friends star - known for being the girl next door - talks and acts dirty as feisty Dr Julia Harris, a dentist who resorts to blackmailing an employee (played by Charlie Day) so he cheats on his fiancee.
"I'm having the time of my life, it's fantastic - the crazy part is the ease with which all these words are falling out of my mouth, I don't know what I've unlocked here," she told USA Today.
The 41-year-old added: "It's so funny and weird and twisted. I'm naked with Charlie Day, who I've known for minutes."
Jennifer has completed filming Horrible Bosses, which also stars Colin Farrell, Kevin Spacey and her co-star in The Switch, Jason Bateman, and which is due for release in 2011.