"The only problem with working with Bob is I just look into his eyes and I kind of fall into his eyes and forget my dialogue," she told DeGeneres.
Fonda and Redford have co-starred in three films -- The Chase (1966), Barefoot in the Park (1967) and The Electric Horseman (1979) -- and will reunite in the new movie Our Souls at Night. The actor also had an uncredited role in Fonda's film Tall Story (1960).
"[He's] so good-looking," the actress gushed. "Yeah, [he's a good kisser]."
"I realize that I've grown up because in the three previous movies, I was always in love with him," she said. "I fell in love every time. So, if a day went by and he wouldn't speak to me ... I always took it personally. Now, when he doesn't talk to me, I'm just like, 'Hey Bob, come on.'"
Our Souls at Night is based on the novel of the same name by Kent Haruf, and will premiere on Netflix later this year. The movie is directed by Ritesh Batra, and co-stars Matthias Schoenaerts and Judy Greer.
"It's about two neighbors who were married and had families in small-town America," Redford told the Daily Express in 2016. "[Their respective spouses] die, so they are living alone separately."
"One day she knocks on his door and says, 'I know this is going to sound weird but would you like to come and sleep with me and just talk?'" he shared. "My character says, 'Let me think about it. Can I get back to you?' But that is what happens ... I think a lot of people will understand that story."