Engaged couple Katy Perry and Russell Brand aren't waiting to wed to expand their family - they've purchased a new kitten, called Krusty.
 
Perry took to Twitter to tell followers that Krusty has joined their cat family, calling the kitten her "third child."
 
Perry has a pet called Kitty Purry, while her fiance's cat is called Morrissey, after the former The Smiths star.

See more photos of Katy here!