"For me, it was just such a different role than (those that) usually come to me," the 44-year-old told showbizspy.com.
"So I was thrilled and I was honored and it was riveting and wonderfully written," she added.
Meanwhile, the actress is keen for her beloved white shepherd mix Dolly, which she adopted as a pup in 2006, to star in a movie.
"Jen taught Dolly to sit, shake and roll over in a few hours, so she's convinced Dolly has the talent - she just needs the right training," said a source.
"She even tried to get Dolly cast in her current movie, 'Squirrels to the Nuts', added the source.
The actress and her fiance Justin Theroux recently adopted a puppy named Sophie in a bid to replace Aniston's beloved mutt Norman, who died in 2011 at the ripe old age of 15.
"Dolly and Sophie get along brilliantly, but Jen loves Dolly like a daughter. Her dream is to do a 'Marley and Me sequel' with Dolly in the lead," said the source.
--IANS (Posted on 17-09-2013)