'Glee' Guest Star Darren Criss Finally Meets Katy Perry

'She's very sweet,' Criss says of 'Teenage Dream' songstress, whom he caught up with at the American Music Awards.

Ever since "Glee" guest star Darren Criss warbled Katy Perry's track "Teenage Dream" on the series' November 9 episode "Never Been Kissed," he and Perry have been directing enthusiastic accolades at one another through the press. The pair finally had the first in-person meeting of their "mutual admiration society" at Sunday's American Music Awards, and Criss left singing Perry's praises once again.

"[I met Perry] very, very quickly," Criss told MTV News while walking the red carpet at Rolling Stone's post-AMA party. "It was cool.

She's very sweet."

Following Criss' debut on the Fox musical series earlier this month, Perry shared her compliments via Twitter, writing, "Oh...My...Gosh... this just brought a sweet tear to my eye! Teenage Dream on GLEE makes my heart go WEEEEE!" She later told

target="_blank">"Access Hollywood," "He's amazing! I love when any of my songs are remixed or interpreted differently. I just love that.

I really welcome a creative mind to anything."

Criss was flattered by Perry's praise, telling MTV News last week the feelings were indeed mutual. "Katy makes my heart 'go weeeee,' " he said.

Criss has been quick to credit Perry and the track's other writers and producers — Dr. Luke, Ben Levin, Bonnie McKee and Max Martin — with the single's success (it reached #1 on the digital downloads chart last week, a first for a "Glee" single).

"I'm forever in [Katy's] debt, basically," Criss said. "She's been very supportive about the whole thing. She's a cool chick, and I'm a big fan."

What did you think of Criss' performance of "Teenage Dream" on "Glee"? Tell us in the comments!