Yesterday, Timberlake tweeted what he probably thought was a harmless, rhetorical question: "Random question: Can someone please explain the saying, “You just want your cake and to eat it too.” What else am I about to do with a cake??"
Farrow was quick to provide an explanation to the actor.
"The saying means, for example, you can't support #TimesUp and praise sexual predators at the same time," she wrote. "You can't retain your credibility as an activist (i.e. retain the cake) and, at the same time, praise a sexual predator (i.e. eating the cake)."
Of course, Farrow is referring to Justin Timberlake choosing to work with Woody Allen in the recent film Wonder Wheel, and then supporting the Time's Up movement by wearing a pin to this year's Golden Globes.
Earlier this month, Greta Gerwig, who worked with Allen on the 2012 movie To Rome with Love, came forward saying she regrets working with the director and that she never will in future.
Both Timothée Chalamet and Rebecca Hall, who are working on a film with Allen currently, have both pledged to donate their salaries to Time's Up.
Timberlake is yet to comment on working with Allen.