She said: "It's always fun to fight with Reese because she is so not... She is such a sweet burst of sunshine, that, you know, she is not someone you want to go scream your head off to. And I usually always end up bursting into laughter at some point.
"It's too hard to be that mad with each other."
Continuing her talk with Kimmel, Aniston answered some of the "least Googled" questions about herself, with her admissions including she likes to vacuum and has met the comedian Carrot Top.
She also insisted she has "nothing" against the Swedes and discussed her chest hair preference on men.
She said: "Not a lot. Meaning not too much and not nothing."
Asked which body part she would choose to make detachable, she laughed and said: "My hair. That would make my life so easy."
But she was left baffled by the final question.
Kimmel said: "Finally, this might be my favourite. Is Jennifer Aniston still married to Lester Holt?"
His guest exclaimed: "That's not real. That's a real question?"
The Cake actress promised she'd look at Google later to examine the link between her and the NBC news anchor.
