Kat Dennings just can't stop gushing about Josh Groban, 34, her beau of eight months—or the 2 Broke Girls costar Beth Behrs that brought them together. "Beth always talked about how great [Josh] is, and they've been friends for years, and she thought we were both, you know, nerds," Kat, 29, said. "So there, she was right."
Cameron Diaz, 42, didn't have to worry about winning over her sister-in-law when she married Benji Madden, 36, in January—Nicole Richie's the one who set them up! "I'm going to take responsibility for everything," boasted the reality star, who's married to Benji's twin brother, Joel.
Following Sofia Vergara's split from Nick Loeb, Joe Manganiello, 38, went through the star's Modern Family friend Jesse Tyler Ferguson to get her number, "I'm like, 'Jesse, no, he's too handsome,'" Sofia, 42, recalled. "Then, after two days of Jesse trying to convince me, I'm like, 'OK, give him my number.'"
John Krasinski, 25, admits it was love at first sight when he was introduced to Emily Blunt, 32, by her Devil Wears Prada costar Anne Hathaway. "I wasn't really looking for a relationship...then I met [Emily]," he recounted. "As I shook her hand, I went 'I like you!'" The couple wed in 2010 and welcomed a daughter four years later, so it's safe to say his line worked!
As a member of the 25-year-old Taylor Swift's star-studded squad, and frequently collaborating with Calvin Harris, 31, it's no wonder Ellie Goulding is behind music's new power couple. She says: "I thought, 'They're both really awesome and really tall, they'll be brilliant together.'"
It turns out pop music's resident nice guy is also prone to playing Cupid: Ed Sheeran introduced his housemate and fellow musician Johnny McDaid, 38, to his bride-to-be, Courteney Cox, 51, in 2013. "They started dating and [are] crazy about each other," Ed said last year. Sounds like Ed is serious best-man material!