Rumors of House of Cards coming to an end have been swirling around even before the shocking sexual allegations from Rapp were made public, which is to say it remains unclear if the show would have soldiered on had Rapp not gone public.
The Oscar-winning Spacey also used the occasion to announce publicly that chose now to "to live as a gay man", a move that drew harsh rebukes swiftly online and otherwise.
Netflix did issue a joint statement with Media Rights Capital (the independent production company behind House of Cards) regarding Rapp's claims.
The final run of House of Cards, which stars Kevin Spacey and Robin Wright as ruthless and ambitious beltway couple, will debut its last 13 episodes in 2018.
Rapp has yet to address Spacey's comments, but on Sunday night he tweeted: "Everything I wanted to say about my experience is in that (BuzzFeed) article, and I have no further comment about it at this time".
Many Hollywood figures have reacted with anger to Kevin Spacey's apology about being physical with former child actor Anthony Rapp at a party 31 years ago - and the older actor's sudden announcement that he is gay.
We have also heard that Netflix's Spacey-starring film Gore about the acerbic author Gore Vidal may be on the chopping block now too.
Kevin Spacey is facing a Hollywood backlash after being accused of historical sex advances towards a 14-year-old boy. He has denied the allegations of sexual assault.
Spacey responded on Twitter by saying he doesn't remember the alleged encounter but if he acted the way Rapp alleges, "I owe him the sincerest apology for what would have been deeply inappropriate drunken behaviour".
Actor Anthony Rapp alleged that Spacey tried to seduce him in 1986, when Rapp was a young teenager.
As more allegations and accusations surface about Harvey Weinstein - including a new Ronan Farrow follow-up in The New Yorker, with harrowing accounts of his rape of Annabella Sciorra and harassment of Daryl Hannah - many have wondered how long it would take the industry to face the parallel problem of sexual exploitation of minors.
He claims he managed to wrangle away from the actor and went home but after recent allegations about Hollywood producer Harvey Weinstein, he made a decision to speak out.
"During the time I worked with Kevin Spacey on 'House of Cards, ' I neither witnessed nor was aware of any inappropriate behavior on set or off", he said.
In a statement on Twitter, Willimon sided with Rapp and said he "supported his courage".