Hayden Panettiere and Wladimir Klitschko
She: A 23-year-old, 5’2” actress who skyrocketed to fame on the NBC drama Heroes and now stars on ABC’s Nashville; has been critically panned for performances in films like Bring It On: All or Nothing and I Love You Beth Cooper
He: A 37-year-old, 6’6” actor and professional boxer from the Ukraine; sixth-longest reigning Heavyweight Champion of all time
Status: The couple began dating in 2009, and Hayden appeared at many of Klitschok’s most important fights. Their 1’4” height difference seemed to prove to be too much, however, and the duo split in May 2011. But — twist! — they not only got back together but got engaged!