In the biography of Natalie Wood, it's discussed that the only person Wood didn't get along with was Moreno.
I don't believe that's quite true. Several sources have said that Wood was very cold to Richard Beymer during the filming of WSS, supposedly because she really wanted Warren Beatty in the part.
And I always freeze frame on that big fat movie star closeup during "Tonight" and just stare at her beauty!
Fun fact: That big fat movie star closeup is there for an odd, specific reason: Natalie Wood filmed most or all of her musical numbers in WSS by lip syncing to her own vocal tracks, which were replaced after the fact by Marni Nixon looping all of the singing. But there was a spot right at the start of the chorus of "Tonight" -- the lyrics "Tonight, tonight, it all began tonight" -- where Natalie was not singing perfectly in time to the music in her pre-record, and obviously the lip movements could not be corrected after the fact. So Robert Wise solved the problem by cutting to a HUGE closeup of Richard Beymer for those lyrics, and then, to balance it, a HUGE closeup of Natalie when Tony sings "Today, all day I had the feeling...."