Sophia Bush, Chad Michael Murray diss [WATCH]: 'One Tree Hill' beauty 'doesn't have anything nice to say' about ex-husband

Actress Sophia Bush fell in love with ex-hubby Chad Michael Murray on-set of the hit CW drama series One Tree Hill. Apparently, those feelings of affection didn't last too long...

Bush and Murray tied the knot in April 2005 - they officially divorced in December 2006. But One Tree Hill lasted for nine seasons... so Bush and Murray continued working with one another for another few years.

And want to know Bush's true feelings on the matter? Her and the popular 32-year-old actor still do NOT get along (at all).

On Monday evening's episode of "Watch What Happens Live" (January 6), a fan called-in and asked Bush when was the last time she ran into her ex. The 31-year-old starlet's response?

"That's such an interesting question... But my mother once said to me that if you don't have anything nice to say, not to say anything at all." 

She then takes a big gulp of her wine.Bush remained pretty hostile about the whole thing... she even uses the word "hate" a few times:

Bush finishes off with, "We were two stupid kids who had no business being in a relationship in the first place." 

The couple broke-up because Murray allegedly cheated on Bush.