How Kat Dennings and Josh Groban Became a Couple

Kat Dennings says she met Josh Groban through her 2 Broke Girls costar -- but first she followed him on Twitter Credit: Michael Buckner/Getty Images

Though Josh Groban's funny Twitter persona played a role in him winning the heart of his new girlfriend, Kat Dennings, he also got a little help from someone else.

Beth Behrs, Dennings's co-star on the CBS sitcom 2 Broke Girls and close friend, was the one responsible for introducing the actress to the "You Raise Me Up" singer.

"He's very witty on the Twitter and I saw his little tweets... and sometimes we would [tweet back and forth]," Dennings, 28, explained on an episode of The Ellen DeGeneres Show that airs Tuesday. "But, yeah she's always talked about how great he is. They've been friends for years. And she thought we were both, you know, nerds. So there, she was right."

Dennings added that her new love is "a wonderful person."

She and the 33-year-old crooner made their red carpet debut together at the Carousel of Hope Ball in Beverly Hills on Oct. 11.

In addition to her new boyfriend, Dennings revealed to the talk show host that she's a big fan of another social media savvy celeb, Kim Kardashian. The Keeping Up With the Kardashians star recently filmed a guest spot for the Oct. 27 premiere of the fourth season of 2 Broke Girls.

[Related: Kim Kardashian Guest Stars on '2 Broke Girls']

"I didn't know what to expect because she's so famous," Dennings said. "I was very nervous because I've seen so many episodes, and she was very sweet. She was very nice. And her ass is amazing! I am feminism, girl power, but I was just so in love with her ass. I just spit talking about it — that's how passionate I feel!"

She continued, "We would say a nice thing or two, talk about friends we know or people we have in common, and then she would turn around and Beth and I would [mouth], 'Oh, my God!' It's beautiful. She's gorgeous. It's just amazing. I've never seen an ass like that in my life. There's an episode of 'Keeping Up With the Kardashians' — an oldie, a vintage one, before she and [Kanye West] got married — and she was doing her music video and Kanye was there and he was like, 'I have never seen an ass like that.' And that's what I was thinking!"

Can you imagine what Groban and Dennings would talk about on a double date with Kim and Kanye? Now that would make for an awesome reality show.