They’ve only been dating seven months, but it looks like wedding bells may soon be ringing for Renee Zellweger and Bradley Cooper. “Renee is so in love with Bradley that her whole face lights up when she talks about him,” a source tells Betty Confidential. “The next step is marriage.”

Ever since falling for one another on the set of the horror film Case 39 last summer, the co-stars have tried to keep their relationship a secret, but with romantic rendezvous in Barcelona, New York and Vancouver, it’s been hard for them to keep things quiet. Renee is rumored to be moving into the $4.7 million three-bedroom mansion that her boyfriend recently purchased in Pacific Palisades, Calif.

And it was clear the couple was serious about each other when she celebrated Christmas with Bradley’s parents, Charlie and Gloria, and Renee took her future mother-in-law to the launch of Vera Wang’s Los Angeles store on March 2 (was she possibly checking out wedding gowns by the famous designer?).

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Even though The Hangover star recently denied rumors that he was shopping for an engagement ring, the source insists Bradley, 35, has been visiting jewelers to buy a canary-diamond ring to put on Renee’s finger. And the wedding could happen as soon as May, right before he starts filming Dark Fields opposite Robert De Niro in his home town of Philadelphia.