Nobody reported that it was dirty, but there was plenty of dancing on the Martha's Vineyard beach last Saturday when actress Jennifer Grey, 41, whose signature role was Baby in 1987's "Dirty Dancing," married actor-screenwriter ("What Lies Beneath") Clark Gregg, 39, reports PEOPLE. The two, who have been dating since last summer, are expecting a baby of their own in December. The more than 70 guests included Michael J. Fox and wife Tracy Pollan (who announced in May that they are expecting their fourth child), and Bill Macy and his wife, Felicity Huffman. The bride's father, "Cabaret" Oscar winner Joel Grey, 69, danced with his mother, Grace Katz, 90, to the Sultans of Swing, just one of the bands that performed. In keeping with the beach theme, the menu was a New England clambake, including lobster, steamed clams and corn on the cob. Gregg's father, Robert Gregg, who is an Episcopal minister and teaches religious studies at Stanford University, performed the ceremony, which was an eclectic interdenominational mix of Jewish and Christian customs. The couple was married under a traditional Jewish "chuppah" (canopy), and, again per Jewish tradition, the groom stomped on a glass at the end of the ceremony. Mazel tov.