“ You ’re doing this show , you ’re on set for , like , 12–14 hours a day , and normally there ’s some middling interesting masses from all walks of life . ”

In the years thatGossip Girlaired between 2007 and 2012, there werealways rumorsabout the cast — from alleged feuds to off-camera love affairs.

As far as romances go,Blake Lively(Serena) andPenn Badgley(Dan),Ed Westwick(Chuck) andJessica Szohr(Vanessa), andLeighton Meester(Blair) andSebastian Stan(Carter) all had real-life relationships after hitting it off on set of the racy teen drama.

And now,Chace Crawford, who famously starred as Nate Archibald, has looked back on hisGossip Girlexperience on this week’s episode of theCall Her Daddypodcast — and it sounds like there may have been another off-screen romance that the public wasn’t privy to.

When asked by host Alex Cooper if he’d ever hooked up with a costar, the 38-year-old hesitated nervously before responding: “I would say those things are inevitable.”

“When you’re in your 20s…the thing is you’re on these things, people probably think it’s these sexy scenes or whatever — that’s like the worst part of it, with 60 people watching,” he said, explaining that it’s actually the “downtime” on set where potential romances can blossom.

Sharing more insight into their social lives while shootingGossip Girl, Chace said he was lucky to constantly meet new people, even if his dating life was “nonexistent” then. He also revealed that he “absolutely” knew about “secret” hookups between other cast members.

And as for who it was? That’s one secret he’ll never tell… XOXO…

More on this

The cast of "Gossip Girl"

Leighton Meester, Penn Badgley, Blake Lively, Chace Crawford, Taylor Momsen, and Ed Westwick pose together at a Gossip Girl event

Chace Crawford sits in a chair, wearing a cardigan and jeans, speaking into a microphone with "Call Her Daddy" merchandise behind him

Closeup of Chace Crawford

Chace Crawford at a red carpet event wearing a black suit jacket over an open white dress shirt

Chace Crawford are sitting close on a park bench, leaning in as if about to kiss. Hilary wears a blazer, while Chace is in a plaid shirt

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Chace Crawford before he was nate archibald and Penn Badgley before he was Dan Humphrey