She's... Hollywood star Jennifer Aniston, 39
He's... US singer/songwriter John Mayer, 30
What's the difference? Nine years. When Jen was born in February 1969, men hadn't yet walked on the moon and The Beatles were still together. By the time John was born in October 1977, the Space Shuttle had made its first test flight and the Sex Pistols were just about to release their first album.
But do they care? It doesn't look like it. Jen and John's relationship has now been public knowledge for two months. They've met each other's friends and been spotted canoodling in public on more than one occasion. But some celeb-watchers warn John's a player, not a stayer: his past high-profile flings include Cameron Diaz, Jessica Simpson and Jennifer Love Hewitt.
Our verdict: Don't get too attached, Jen!