Robert Redford was unhappy with cuts made to the film following a preview. He said, "I think we'd both have preferred a more political Dalton Trumbo -type script, but finally Sydney came down on the side of the love story. He said, 'This is first and foremost a love affair,' and we conceded that. We trusted his instincts, and he was right."
When Barbra Streisand heard the titular song for the first time, she loved it. However, she made two important suggestions that ended up transforming the song into something even better. She suggested a slight shift in the melody to send it soaring at a crucial point in the song, and she also suggested changing the first line of the song from "Daydreams light the corners of my mind" to "Memories light the corners of my mind."
Despite their differences, Barbra Streisand and Robert Redford had a deep respect for each other and worked well together. They were both opposite in many ways, just like their characters, and they used those differences to the benefit of the film.
Arthur Laurents fought to keep the exchange: "I want us to love each other." "The trouble is we do." Laurents said that line "summed up the relationship between Hubbell and Katie. They loved each other despite, not because." To Laurents' dismay, Sydney Pollack ended up cutting the line. "The problem," Laurents claimed, "was that the man who was directing a political love story knew even less about love than he did about politics."
Barbra Streisand and Robert Redford had very different approaches to acting. Streisand liked to analyze the part at length and rehearse a great deal, while Redford was more of an intuitive actor, preferring to be more spontaneous. According to Sydney Pollack, "Barbra would call me up every night at nine, ten o'clock and talk about the next day's work for an hour, two hours on the phone. Then she'd get in there and start to talk and Bob would want to do it. And Bob felt the more the talk went, the staler he got. She would feel like he was rushing her. The more rehearsing we did, she would begin to go uphill and he would peak and go downhill. So I was like a jockey trying to figure out when to roll the camera and get them to coincide."