In her first comments about an upcoming return to prime time television, Jennifer Aniston tells ET Canada that shooting the NBC hit '30 Rock,' was an absolute blast - confirming that her appearance has already been captured on film.  

"It was awesome - really, really fun," Aniston said, complementing the '30 Rock' cast members, who she calls "stellar." The Emmy-award winning actress spoke to ET Canada while promoting her new film 'Management' at the Toronto Film Festival.

Last week, ET brought you all-new footage of Aniston working a scene on the New York City set of "30 Rock." She joins the show for one episode this fall to play the former roommate of Tina Fey's character Liz Lemon -- who also happens to be stalking Alec Baldwin's character Jack Donaghy! 

Speaking about her involvement in the "Stand Up to Cancer" TV benefit Friday night, Aniston said it turned out to be a great event that raised more than $100 million dollars. Aniston, 39, said such a telethon makes her feel that a star's celebrity status can have a positive effect if it is used in the right way. "We have opportunities. You have to be very careful. You have to be very specific where you use the power of your celebrity."