Eric Dane & Rebecca Gayheart
09/28/2009 AT 04:05 PM EDT
Out on a stroll in Los Angeles last weekend with husband Eric Dane, Rebecca Gayheart showed in public what the couple's close friends have known for some time: that she's expecting. In February, Dane, 37, told Ellen DeGeneres that he and Gayheart, 38, wanted a baby.
"They're definitely happy," a source tells PEOPLE. "They've been trying for so long." Reps for the pair have not commented.