On "Friends", who guest starred as Rachel's sister, Jill?

On "Friends," Reese Witherspoon guest starred as Rachel’s sister, Jill.

Jill Green arrives in New York after their father cuts off her financial support and sends her to Rachel, whom he considers his most responsible daughter. Her privileged, impulsive personality immediately clashes with Rachel’s attempts to teach her independence.

Jill is played by Reese Witherspoon, who was already a major film actor when she appeared on the sitcom. The storyline becomes more complicated when Jill dates Ross, partly to irritate Rachel. Rachel objects strongly, especially because of her unresolved feelings about Ross.

A common mix-up is Jill’s sister Amy, who was played by Christina Applegate. Both characters are Rachel’s spoiled sisters, but they are different characters portrayed by different actors. Witherspoon’s Jill is also distinct from other celebrity guest roles on the show, such as Bruce Willis’s and Brad Pitt’s appearances.