Jennifer Aniston head over heels for 'cute' new man

Jennifer Aniston admits she is totally smitten with her beau Justin Theroux.

The couple have been dating for nearly a year, and although they star in the new film Wanderlust together, Aniston insists that their relationship did not flourish on set but began after filming wrapped.

"Nothing happened on that movie," the 43-year-old actress told US network ABC News' Lara Spencer.

"I mean, that was sort of - that's what is a rumour. I mean, it's again, it's the easy rumour. But nothing happened.

"We were just friends, great friends on the movie. I've known Justin for a long time - we met when he was shooting Tropic Thunder. He is really cute."

And the actress, who has been in the limelight for more than two decades, says she has gotten used to attention from the paparazzi, but is trying to keep her relationship with Justin as private as she can.

"I've gotten to a place where I know we can - we know how to maneuver around them a little bit more," Aniston revealed.

"I've laid on many a floorboard."

- AAP