Brian Austin Green and Tori Spelling of Beverly Hills, 90210

Character names: David Silver & Donna Martin
Years dated in real life: 4 months

Beverly Hills, 90210's Tori Spelling and Brian Austin Green, the current Mr. Megan Fox, were, for a short time, the Hollywood "It" couple of 1990. And though their off-screen relationship fizzled after just a few months, their TV characters eventually exchanged vows during the series' final episode in 2000.