Quote:
"During rehearsal, Celine [Song] never wanted Greta [Lee] and I to touch. I'd go in for a hug or to shake her hand, and she would say, 'No, save it for the screen.' So when you see us meet in New York for the first time in 24 years, that's actually the first time we ever touched, so we yearned for each other. I had this really visceral feeling [while shooting]—my palms were sweating and my heart was pounding out of my chest. I'm really grateful the audience gets to experience that, too."
-- Teo Yoo

Source:
Rankin, Seija. "Next big thing: 'Past Lives'' Teo Yoo on not being able to hug his co-star." Interview with Teo Yoo. Hollywood Reporter, June 1, 2023.