Pals: Adrien Brody "Happy" Dating January Jones

Credit: John Shearer/Getty Images; Kevin Winter/Getty Images

Romance under wraps!

Adrien Brody denied reports that he was dating Mad Men's January Jones, calling her "a friend," this spring. But a source tells Us Weekly that Brody, 37, has fallen hard for Jones, 32 (who has dated Ashton Kutcher and Josh Groban, and has been linked to Jeremy Piven).

"Adrien loves talking about January," says the insider. "He says, 'We're dating. We're really happy!'" (The secret couple was recently spotted at NYC's Rose Bar.)

Still, the Splice actor didn't look too attached at L.A.'s Omega Constellation Launch June 26. "He was flirting with girls," says a source. "He was partying hard."