Jennifer Aniston left the '30 Rock' cast "star struck" when she filmed her cameo.

The former 'Friends' actress - who stars as a "free-spirited stalker" in the
one-off episode of the hit US sitcom - was such a hit on set she may return
in future episodes.
Jack McBrayer, who plays Kenneth Parcell on the show, said: "It was really
fantastic. It was impressive. We were all taking notes. I think we are all
star struck by her."
Although the cast and crew were initially nervous about meeting the
39-year-old beauty, Jennifer quickly put everyone at ease and happily posed
for photos.
Jack added to People magazine: "She was an absolute delight. She is such a
pro, and she was just so lovely to be around.
"I got a picture taken with her, so that's all I needed."
Earlier this month, Jennifer revealed she loved shooting her cameo
appearance and praised the cast, which also includes Alec Baldwin and Tina
Fey.
She said: "It was awesome, really, really fun, and the cast are stellar."