"He's a wonderful person... I hadn't met him before but he's very witty on the Twitter and I saw his little tweets sometimes and would respond... but she's (Beth Behrs) always talked about how great he is and they've been friends for years. She thought we were both nerds. And she was right." 2 Broke Girls star Kat Dennings was introduced to her new singer boyfriend Josh Groban by her co-star Beth Behrs.