Jennifer Aniston and Reese Witherspoon compete in 'Friends' trivia

Actresses and producers Jennifer Aniston, left and Reese Witherspoon, pose for photographers upon arrival at the photo call of 'The Morning Show' at a central London hotel, Friday, Nov. 01, 2019. (Photo by Joel C Ryan/Invision/AP)

LONDON, United Kingdom (WTHR) — Rachel Green vs. Jill Green: the battle of the sisters!

Jennifer Aniston and Reese Witherspoon were guests on last week's episode of "The Graham Norton Show" to promote their new Apple TV+ series, "The Morning Show," but played a friendly trivia game about the time they were sisters on "Friends."

Sir Ian McKellen played moderator and asked the two actresses a series of questions about the popular NBC sitcom and the characters they played.

Dame Julie Andrews even joined in on the fun and answered the final question correctly!

"The Graham Norton Show" airs new episodes weekly on BBC.

The first three episodes of "The Morning Show" are now available to stream on Apple TV+. The final seven episodes of the first season will be released one at a time on Fridays.