Amanda Seyfried and Ryan Phillippe Officially Split

Well, it was fun while it lasted.

After three months of dating, Amanda Seyfried, 25, and Ryan Phillippe, 36, have called an end to their three-month romance.

“They are not dating anymore,” a source reveals to UsMagazine.com. “And it’s not a big deal for either of them.”

That seemed clear on Saturday when Phillippe hit on Rihanna, 22, at the Gucci/Roc Nation brunch at L.A.’s Soho House.

“He said something to the effect of, ‘What are you doing tonight?’” a witness tells the new issue of Us Weekly.