Orlando Bloom and Katy Perry's relationship is more "serious" than ever.

The couple rekindled their romance after a year apart, and it looks like distance made their hearts grow fonder as they are much "stronger" after their break.

A source revealed the pair are dating exclusively again and things seem more serious.

They even spent the weekend in Rome with Katy's mother, Mary Hudson, where the ‘Roar’ singer described her boyfriend as her ‘darling’ in a video.

It looks like there isn’t just a spark in their romance but, as Katy would say, a ‘Firework’.