Blonde bombshell, 75, who dated Sylvester Stallone steps out with Seinfeld star husband, 71… can you guess the Hollywood golden couple?

A Golden Globe nominee and one of the biggest sex symbols of the late 1970s and 1980s was seen on a rare public outing this week.The siren, now 75, shot to fame in her 1979 debut film, Goldengirl, but a year-long fling with the still-married…