Christopher Nolan: "Bittersweet" to have "Oppenheimer" cast leave London premiere amid SAG-AFTRA strike

During the London premiere of the highly anticipated film "Oppenheimer," some stars left early to join the picket lines in support of the SAG-AFTRA strike.

"It was very bittersweet to have the actors there supporting the film, and then understanding that they needed to then leave and go on strike," the film's writer and director, Christopher Nolan, told "CBS Mornings" in an interview that aired on Thursday.

Nolan emphasized the significance of the actors' strike and a parallel one held by the Writers Guild of America since May.