Jennifer Aniston and John Mayer's whirlwind 2008 romance had fans captivated but ultimately ended due to clashing life stages and age differences ...

Halloweentown II costars Kimberly J. Brown and Daniel Kountz reunited 15 years after their Disney Channel movie, fell in love ...

They may stay friends for a long time or reconnect years later before falling in love.Here are 18 costars who started dating ...