"Beverly Hills 90210" star Jason Priestley and makeup artist Ashlee Peterson, both 29, Feb. 2, aboard a boat in Miami (the captain officiated), after having dated for a year and a half. It is the first marriage for both, though she has a 5-year-old son from a previous relationship .. Former "Brady Bunch" star Barry Williams (he played Greg), 44, to Eila Mary Matt, age undisclosed, an investment-banking executive, Jan. 30, in a private ceremony in New York. They met two years ago while vacationing at a Club Med. This marks his second marriage; his first, to a former Miss Arizona, ended in divorce several years ago.