How Kat Dennings Met New Boyfriend Josh Groban
10/21/2014 AT 02:00 PM EDT
The new couple were first introduced by Dennings's costar, Beth Behrs, she revealed on Tuesday's The Ellen DeGeneres Show.
"She's always talked about how great he is and they've been friends for years, and she thought we were both, you know, nerds," Dennings said. "So there, she was right."
But Dennings, 28, did get to know Groban, 33, through social media before they ever met in person.
"He's very witty on the Twitter, and I saw his little Tweets sometimes," she explained, giggling.
The actress and musician first stepped out together Oct. 11 at the Carousel of Hope Ball in Beverly Hills. Still, Dennings admitted she's crushing on a certain well-endowed guest star from her CBS comedy: Kim Kardashian.
"I am feminism, girl power, but I was just so in love with her a--," she gushed. "It's beautiful! She's gorgeous. It's just amazing. I've never seen an a-- like that in my life."
Watch the full interview below: