TheStewartofNY/Getty; Gilbert Flores/WWD via Getty

Penn Badgleyis paying tribute to hisGossip GirlcostarMichelle Trachtenberg.

“What I remember of her is she was incredibly quick to laugh,” Badgley toldE!

Newsof his former castmate, who played Georgina Sparks on all six seasons of the CW teen drama.

Penn Badgley at the ‘You’ season 5 New York City premiere on April 23, 2025; Michelle Trachtenberg at the 15 Years of Siriano Party in Los Angeles on Nov. 2, 2023

Penn Badgley at the ‘You’ season 5 New York premiere in 2025; Michelle Trachtenberg in Los Angeles in 2023.Credit:TheStewartofNY/Getty; Gilbert Flores/WWD via Getty

“She was really joyous,” Badgley said.

Badgley was understandably stunned to learn of Trachtenberg’s sudden death.

“It’s surreal,” he said.

Sarah Michelle Gellar, Michelle Trachtenberg, David Boreanaz

‘Gossip Girl’ costars Michelle Trachtenberg and Penn Badgley in 2009.NEIL RASMUS/Patrick McMullan via Getty

“Really surreal, really saddening.”

“I remember her coming on set for the first time and just absolutely owning it.

Just a terrible loss.

Mara Wilson; Michelle Trachtenberg

“She was electricity,” theIt Ends With Usstar wrote.

“Everything she did, she did 200 percent.

Taylor Momsen (Jenny Humphrey)memorialized Trachtenbergin her own Instagram post.

Michelle Trachtenberg and Penn Badgley at Limited Edition ANNA SUI for TARGET “Gossip Girl” Inspired Collection NYC Debut on Sept. 9, 2009

‘Gossip Girl’ costars Michelle Trachtenberg and Penn Badgley in 2009.NEIL RASMUS/Patrick McMullan via Getty

“She was simply awesome.

I’ll miss our late-night calls that no one should ever hear but us.

She was always in my corner and there to support me whether I was right or wrong.

I will miss you every day, my love… Ed Westwick(Chuck Bass) also shared his condolences.

“So sad to hear of the passing of @michelletrachtenberg,” he wrote on Instagram.

“Sending prayers.”