Peter Krause and Lauren Graham

They may have played siblings on the NBC show Parenthood, but that didn't stop Peter Krause and Lauren Graham from falling for each other. They first met in 1995 on the sitcom Caroline in the City but it wasn't until they landed the roles of Adam and Sarah Braverman in 2010 that they started dating. The couple has kept a relatively private life. It is unclear whether they are anything more than dating, but in a 2014 interview with Ellen DeGeneres, Graham said her relationship was "good the way it is."