Question
Friends Season 6 promo shot

Which actress played Rachel's sister Jill on "Friends"?

Last updated: February 3, 2026

Guest starring on "Friends" as someone's family member was a golden ticket to scene-stealing moments. The show cast celebrities to play siblings, parents, and surprise relatives, including both of Rachel's sisters, who showed up to borrow money, break rules, and date Ross. Which actress played Rachel's sister Jill on "Friends"?

Correct Answer: Reese Witherspoon

(Source)

Christina Applegate showed up later as Amy and won an Emmy, but Reese Witherspoon came first as Jill, the spoiled youngest sibling who dated Ross to spite Rachel. It was Witherspoon's first time performing in front of a live audience. Jennifer Aniston helped calm her nerves, Matt LeBlanc gave her the "How you doin'?" treatment, and her line "The only thing I can't have is dairy" became an instant classic.

Tabloids talked about a feud between Witherspoon and Aniston after Jill's planned six-episode arc got cut short, but like most tabloid stories, it was total garbage. The two became close friends and eventually co-starred on "The Morning Show," where they finally got to work together without fighting over Ross.

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