Warning: This article contains spoilers for the series finale of Gossip Girl.

Pretty Little Liars is a twisty mystery about conniving high schoolers, so is it any surprise that showrunner Marlene King is a fan of Gossip Girl?

That twisty show about conniving high schoolers (OK, they're well beyond high school now, but that's how it started) came to an end last night (December 17), but not before revealing the final twist: Dan Humphrey (Penn Badgley) is the titular Gossip Girl. Cue shock and awe.

This twist would be somewhat akin to PLL revealing that one of the main good guys killed Alison (Sasha Pieterse) or is the leader of the "A"s, so of course we were curious about how Marlene felt about it.

Fortunately, she tweeted her feelings, saying, "Dan is Gossip Girl? I'm cool w that." Well, of course she is! After all, she's the same woman who's cool with making Toby (Keegan Allen) part of the "A" team...

She also gave a shoutout to Gossip Girl creators Josh Schwartz and Stephanie Savage, saying, "Congrats to Stephani and Josh. 6 years of keeping us excited and guessing. Xoxo."

Gossip Girl fans: Do you agree with Marlene?

Catch the return of PLL Season 3 on Tuesday, January 8, 2013 at 8 p.m. ET/PT on ABC Family.

Source: @imarleneking

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.