Also in attendance at the event was rapper Big Sean.
It was just revealed that Kat and her fiance Cottrell Guidry have split after being engaged for two years. The couple got engaged in October 2012 and earlier this year the 25-year-old Vampire Diaries actress had revealed that she was almost done with her wedding planning.
“It’s happened a while ago,” a source told E! News of the split. “There wasn’t any drama and they are still friends.”
FYI: Kat is wearing a Pamella Roland dress.