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“It was so bizarrely sad. “I have to say, because I did the show at the beginning of the year and I was really emotional then, and I kind of was like, ‘I can’t do that on the last show. I’m going to really lose it.'”

During the series finale, Aniston also gifted DeGeneres a “Thanks for the Memories” welcome mat, in a nod to the mat she gave the host during their first on-air conversation years ago.

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And even though it’s been a few weeks since DeGeneres has wrapped the series, Aniston says she still hasn’t processed how she’ll never be a guest on the talk show again.

“I still can’t wrap my head around [the fact] that that’s it,” she says. “It’s not going to be there anymore, because it was such a staple.”

“Even though the world was there before Ellen and now it’ll be there after, she was such a source of entertainment and love and joy and laughter for people. It’s sad,” she adds. “I don’t understand what’s going to fill it.”